[PATCH net-next v2 0/2] virtio_net: add ethtool get/set settings support

[PATCH net-next v2 0/2] virtio_net: add ethtool get/set settings support

[Nikolay Aleksandrov]

From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Hi,
Patch 1 adds ethtool speed/duplex validation functions which check if the
value is defined. Patch 2 adds support for ethtool (get|set)_settings and
uses the validation functions to check the user-supplied values.

v2: split in 2 patches to allow everyone to make use of the validation
functions and allow virtio_net devices to be half duplex

Cheers,
 Nik


Nikolay Aleksandrov (2):
  ethtool: add speed/duplex validation functions
  virtio_net: add ethtool support for set and get of settings

 drivers/net/virtio_net.c     | 41 +++++++++++++++++++++++++++++++++++++++++
 include/uapi/linux/ethtool.h | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)

-- 
2.4.3

[PATCH net-next v2 1/2] ethtool: add speed/duplex validation functions

[Nikolay Aleksandrov]

From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Add functions which check if the speed/duplex are defined.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
---
v2: new patch

 include/uapi/linux/ethtool.h | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 57fa39005e79..b2e180181629 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1319,11 +1319,45 @@ enum ethtool_sfeatures_retval_bits {
 
 #define SPEED_UNKNOWN		-1
 
+static inline int ethtool_validate_speed(__u32 speed)
+{
+	switch (speed) {
+	case SPEED_10:
+	case SPEED_100:
+	case SPEED_1000:
+	case SPEED_2500:
+	case SPEED_5000:
+	case SPEED_10000:
+	case SPEED_20000:
+	case SPEED_25000:
+	case SPEED_40000:
+	case SPEED_50000:
+	case SPEED_56000:
+	case SPEED_100000:
+	case SPEED_UNKNOWN:
+		return 1;
+	}
+
+	return 0;
+}
+
 /* Duplex, half or full. */
 #define DUPLEX_HALF		0x00
 #define DUPLEX_FULL		0x01
 #define DUPLEX_UNKNOWN		0xff
 
+static inline int ethtool_validate_duplex(__u8 duplex)
+{
+	switch (duplex) {
+	case DUPLEX_HALF:
+	case DUPLEX_FULL:
+	case DUPLEX_UNKNOWN:
+		return 1;
+	}
+
+	return 0;
+}
+
 /* Which connector port. */
 #define PORT_TP			0x00
 #define PORT_AUI		0x01
-- 
2.4.3

[PATCH net-next v2 2/2] virtio_net: add ethtool support for set and get of settings

[Nikolay Aleksandrov]

From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

This patch allows the user to set and retrieve speed and duplex of the
virtio_net device via ethtool. Having this functionality is very helpful
for simulating different environments and also enables the virtio_net
device to participate in operations where proper speed and duplex are
required (e.g. currently bonding lacp mode requires full duplex). Custom
speed and duplex are not allowed, the user-supplied settings are validated
before applying.

Example:
$ ethtool eth1
Settings for eth1:
...
	Speed: Unknown!
	Duplex: Unknown! (255)
$ ethtool -s eth1 speed 1000 duplex full
$ ethtool eth1
Settings for eth1:
...
	Speed: 1000Mb/s
	Duplex: Full

Based on a patch by Roopa Prabhu.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
---
v2: use the new ethtool speed/duplex validation functions and allow half
duplex to be set

 drivers/net/virtio_net.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 767ab11a6e9f..88fdb162c5f5 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -146,6 +146,10 @@ struct virtnet_info {
 	virtio_net_ctrl_ack ctrl_status;
 	u8 ctrl_promisc;
 	u8 ctrl_allmulti;
+
+	/* Ethtool settings */
+	u8 duplex;
+	u32 speed;
 };
 
 struct padded_vnet_hdr {
@@ -1376,6 +1380,39 @@ static void virtnet_get_channels(struct net_device *dev,
 	channels->other_count = 0;
 }
 
+static int virtnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct virtnet_info *vi = netdev_priv(dev);
+	u32 speed = ethtool_cmd_speed(cmd);
+
+	/* don't allow custom speed and duplex */
+	if (!ethtool_validate_speed(speed) ||
+	    !ethtool_validate_duplex(cmd->duplex))
+		return -EINVAL;
+	vi->speed = speed;
+	vi->duplex = cmd->duplex;
+
+	return 0;
+}
+
+static int virtnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct virtnet_info *vi = netdev_priv(dev);
+
+	ethtool_cmd_speed_set(cmd, vi->speed);
+	cmd->duplex = vi->duplex;
+
+	return 0;
+}
+
+static void virtnet_init_settings(struct net_device *dev)
+{
+	struct virtnet_info *vi = netdev_priv(dev);
+
+	vi->speed = SPEED_UNKNOWN;
+	vi->duplex = DUPLEX_UNKNOWN;
+}
+
 static const struct ethtool_ops virtnet_ethtool_ops = {
 	.get_drvinfo = virtnet_get_drvinfo,
 	.get_link = ethtool_op_get_link,
@@ -1383,6 +1420,8 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
 	.set_channels = virtnet_set_channels,
 	.get_channels = virtnet_get_channels,
 	.get_ts_info = ethtool_op_get_ts_info,
+	.get_settings = virtnet_get_settings,
+	.set_settings = virtnet_set_settings,
 };
 
 #define MIN_MTU 68
@@ -1855,6 +1894,8 @@ static int virtnet_probe(struct virtio_device *vdev)
 	netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs);
 	netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs);
 
+	virtnet_init_settings(dev);
+
 	err = register_netdev(dev);
 	if (err) {
 		pr_debug("virtio_net: registering device failed\n");
-- 
2.4.3

Re: [PATCH net-next v2 1/2] ethtool: add speed/duplex validation functions

[Michael S. Tsirkin]

On Tue, Feb 02, 2016 at 03:33:39PM +0100, Nikolay Aleksandrov wrote:
> From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
> 
> Add functions which check if the speed/duplex are defined.
> 
> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Acked-by: Michael S. Tsirkin <mst@redhat.com>

> ---
> v2: new patch
> 
>  include/uapi/linux/ethtool.h | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
> index 57fa39005e79..b2e180181629 100644
> --- a/include/uapi/linux/ethtool.h
> +++ b/include/uapi/linux/ethtool.h
> @@ -1319,11 +1319,45 @@ enum ethtool_sfeatures_retval_bits {
>  
>  #define SPEED_UNKNOWN		-1
>  
> +static inline int ethtool_validate_speed(__u32 speed)
> +{
> +	switch (speed) {
> +	case SPEED_10:
> +	case SPEED_100:
> +	case SPEED_1000:
> +	case SPEED_2500:
> +	case SPEED_5000:
> +	case SPEED_10000:
> +	case SPEED_20000:
> +	case SPEED_25000:
> +	case SPEED_40000:
> +	case SPEED_50000:
> +	case SPEED_56000:
> +	case SPEED_100000:
> +	case SPEED_UNKNOWN:
> +		return 1;
> +	}
> +
> +	return 0;
> +}
> +
>  /* Duplex, half or full. */
>  #define DUPLEX_HALF		0x00
>  #define DUPLEX_FULL		0x01
>  #define DUPLEX_UNKNOWN		0xff
>  
> +static inline int ethtool_validate_duplex(__u8 duplex)
> +{
> +	switch (duplex) {
> +	case DUPLEX_HALF:
> +	case DUPLEX_FULL:
> +	case DUPLEX_UNKNOWN:
> +		return 1;
> +	}
> +
> +	return 0;
> +}
> +
>  /* Which connector port. */
>  #define PORT_TP			0x00
>  #define PORT_AUI		0x01
> -- 
> 2.4.3

Re: [PATCH net-next v2 2/2] virtio_net: add ethtool support for set and get of settings

[Michael S. Tsirkin]

On Tue, Feb 02, 2016 at 03:33:40PM +0100, Nikolay Aleksandrov wrote:
> From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
> 
> This patch allows the user to set and retrieve speed and duplex of the
> virtio_net device via ethtool. Having this functionality is very helpful
> for simulating different environments and also enables the virtio_net
> device to participate in operations where proper speed and duplex are
> required (e.g. currently bonding lacp mode requires full duplex). Custom
> speed and duplex are not allowed, the user-supplied settings are validated
> before applying.
> 
> Example:
> $ ethtool eth1
> Settings for eth1:
> ...
> 	Speed: Unknown!
> 	Duplex: Unknown! (255)
> $ ethtool -s eth1 speed 1000 duplex full
> $ ethtool eth1
> Settings for eth1:
> ...
> 	Speed: 1000Mb/s
> 	Duplex: Full
> 
> Based on a patch by Roopa Prabhu.
> 
> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
> ---
> v2: use the new ethtool speed/duplex validation functions and allow half
> duplex to be set
> 
>  drivers/net/virtio_net.c | 41 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 767ab11a6e9f..88fdb162c5f5 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -146,6 +146,10 @@ struct virtnet_info {
>  	virtio_net_ctrl_ack ctrl_status;
>  	u8 ctrl_promisc;
>  	u8 ctrl_allmulti;
> +
> +	/* Ethtool settings */
> +	u8 duplex;
> +	u32 speed;
>  };
>  
>  struct padded_vnet_hdr {
> @@ -1376,6 +1380,39 @@ static void virtnet_get_channels(struct net_device *dev,
>  	channels->other_count = 0;
>  }
>  
> +static int virtnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> +{
> +	struct virtnet_info *vi = netdev_priv(dev);

need an empty line here.

> +	u32 speed = ethtool_cmd_speed(cmd);
> +
> +	/* don't allow custom speed and duplex */
> +	if (!ethtool_validate_speed(speed) ||
> +	    !ethtool_validate_duplex(cmd->duplex))
> +		return -EINVAL;

There's a problem here: rest of the fields are ignored.
Here's one way to validate user doesn't attempt to set them:

	struct ethtool_cmd diff1 = cmd;
	struct ethtool_cmd diff2 = {};

	ethtool_cmd_speed_set(&diff1, 0);
	diff1.duplex = 0;

	if (memcmp(&diff1, &diff2, sizeof diff1))
		return -EINVAL;


> +	vi->speed = speed;
> +	vi->duplex = cmd->duplex;
> +
> +	return 0;
> +}
> +
> +static int virtnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> +{
> +	struct virtnet_info *vi = netdev_priv(dev);
> +
> +	ethtool_cmd_speed_set(cmd, vi->speed);
> +	cmd->duplex = vi->duplex;


I think we should at least set port to PORT_OTHER.

> +
> +	return 0;
> +}
> +
> +static void virtnet_init_settings(struct net_device *dev)
> +{
> +	struct virtnet_info *vi = netdev_priv(dev);
> +
> +	vi->speed = SPEED_UNKNOWN;
> +	vi->duplex = DUPLEX_UNKNOWN;
> +}
> +
>  static const struct ethtool_ops virtnet_ethtool_ops = {
>  	.get_drvinfo = virtnet_get_drvinfo,
>  	.get_link = ethtool_op_get_link,
> @@ -1383,6 +1420,8 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
>  	.set_channels = virtnet_set_channels,
>  	.get_channels = virtnet_get_channels,
>  	.get_ts_info = ethtool_op_get_ts_info,
> +	.get_settings = virtnet_get_settings,
> +	.set_settings = virtnet_set_settings,
>  };
>  
>  #define MIN_MTU 68
> @@ -1855,6 +1894,8 @@ static int virtnet_probe(struct virtio_device *vdev)
>  	netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs);
>  	netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs);
>  
> +	virtnet_init_settings(dev);
> +
>  	err = register_netdev(dev);
>  	if (err) {
>  		pr_debug("virtio_net: registering device failed\n");
> -- 
> 2.4.3

Re: [PATCH net-next v2 2/2] virtio_net: add ethtool support for set and get of settings

[Nikolay Aleksandrov]

On 02/02/2016 03:54 PM, Michael S. Tsirkin wrote:
> On Tue, Feb 02, 2016 at 03:33:40PM +0100, Nikolay Aleksandrov wrote:
>> From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
>>
>> This patch allows the user to set and retrieve speed and duplex of the
>> virtio_net device via ethtool. Having this functionality is very helpful
>> for simulating different environments and also enables the virtio_net
>> device to participate in operations where proper speed and duplex are
>> required (e.g. currently bonding lacp mode requires full duplex). Custom
>> speed and duplex are not allowed, the user-supplied settings are validated
>> before applying.
>>
>> Example:
>> $ ethtool eth1
>> Settings for eth1:
>> ...
>> 	Speed: Unknown!
>> 	Duplex: Unknown! (255)
>> $ ethtool -s eth1 speed 1000 duplex full
>> $ ethtool eth1
>> Settings for eth1:
>> ...
>> 	Speed: 1000Mb/s
>> 	Duplex: Full
>>
>> Based on a patch by Roopa Prabhu.
>>
>> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
>> ---
>> v2: use the new ethtool speed/duplex validation functions and allow half
>> duplex to be set
>>
>>  drivers/net/virtio_net.c | 41 +++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 41 insertions(+)
>>
>> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
>> index 767ab11a6e9f..88fdb162c5f5 100644
>> --- a/drivers/net/virtio_net.c
>> +++ b/drivers/net/virtio_net.c
>> @@ -146,6 +146,10 @@ struct virtnet_info {
>>  	virtio_net_ctrl_ack ctrl_status;
>>  	u8 ctrl_promisc;
>>  	u8 ctrl_allmulti;
>> +
>> +	/* Ethtool settings */
>> +	u8 duplex;
>> +	u32 speed;
>>  };
>>  
>>  struct padded_vnet_hdr {
>> @@ -1376,6 +1380,39 @@ static void virtnet_get_channels(struct net_device *dev,
>>  	channels->other_count = 0;
>>  }
>>  
>> +static int virtnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
>> +{
>> +	struct virtnet_info *vi = netdev_priv(dev);
> 
> need an empty line here.
> 

The next line is a local variable declaration, you want a new line between
the two local variable declarations ?

>> +	u32 speed = ethtool_cmd_speed(cmd);
>> +
>> +	/* don't allow custom speed and duplex */
>> +	if (!ethtool_validate_speed(speed) ||
>> +	    !ethtool_validate_duplex(cmd->duplex))
>> +		return -EINVAL;
> 
> There's a problem here: rest of the fields are ignored.
> Here's one way to validate user doesn't attempt to set them:
> 

Hmm, yes, they'll silently get ignored without an error. Good point,
and I'll modify as necessary.

Thanks!

> 	struct ethtool_cmd diff1 = cmd;
> 	struct ethtool_cmd diff2 = {};
> 
> 	ethtool_cmd_speed_set(&diff1, 0);
> 	diff1.duplex = 0;
> 
> 	if (memcmp(&diff1, &diff2, sizeof diff1))
> 		return -EINVAL;
> 
> 
>> +	vi->speed = speed;
>> +	vi->duplex = cmd->duplex;
>> +
>> +	return 0;
>> +}
>> +
>> +static int virtnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
>> +{
>> +	struct virtnet_info *vi = netdev_priv(dev);
>> +
>> +	ethtool_cmd_speed_set(cmd, vi->speed);
>> +	cmd->duplex = vi->duplex;
> 
> 
> I think we should at least set port to PORT_OTHER.
> 
>> +
>> +	return 0;
>> +}
>> +
>> +static void virtnet_init_settings(struct net_device *dev)
>> +{
>> +	struct virtnet_info *vi = netdev_priv(dev);
>> +
>> +	vi->speed = SPEED_UNKNOWN;
>> +	vi->duplex = DUPLEX_UNKNOWN;
>> +}
>> +
>>  static const struct ethtool_ops virtnet_ethtool_ops = {
>>  	.get_drvinfo = virtnet_get_drvinfo,
>>  	.get_link = ethtool_op_get_link,
>> @@ -1383,6 +1420,8 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
>>  	.set_channels = virtnet_set_channels,
>>  	.get_channels = virtnet_get_channels,
>>  	.get_ts_info = ethtool_op_get_ts_info,
>> +	.get_settings = virtnet_get_settings,
>> +	.set_settings = virtnet_set_settings,
>>  };
>>  
>>  #define MIN_MTU 68
>> @@ -1855,6 +1894,8 @@ static int virtnet_probe(struct virtio_device *vdev)
>>  	netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs);
>>  	netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs);
>>  
>> +	virtnet_init_settings(dev);
>> +
>>  	err = register_netdev(dev);
>>  	if (err) {
>>  		pr_debug("virtio_net: registering device failed\n");
>> -- 
>> 2.4.3

Re: [PATCH net-next v2 2/2] virtio_net: add ethtool support for set and get of settings

[Michael S. Tsirkin]

On Tue, Feb 02, 2016 at 03:59:52PM +0100, Nikolay Aleksandrov wrote:
> On 02/02/2016 03:54 PM, Michael S. Tsirkin wrote:
> > On Tue, Feb 02, 2016 at 03:33:40PM +0100, Nikolay Aleksandrov wrote:
> >> From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
> >>
> >> This patch allows the user to set and retrieve speed and duplex of the
> >> virtio_net device via ethtool. Having this functionality is very helpful
> >> for simulating different environments and also enables the virtio_net
> >> device to participate in operations where proper speed and duplex are
> >> required (e.g. currently bonding lacp mode requires full duplex). Custom
> >> speed and duplex are not allowed, the user-supplied settings are validated
> >> before applying.
> >>
> >> Example:
> >> $ ethtool eth1
> >> Settings for eth1:
> >> ...
> >> 	Speed: Unknown!
> >> 	Duplex: Unknown! (255)
> >> $ ethtool -s eth1 speed 1000 duplex full
> >> $ ethtool eth1
> >> Settings for eth1:
> >> ...
> >> 	Speed: 1000Mb/s
> >> 	Duplex: Full
> >>
> >> Based on a patch by Roopa Prabhu.
> >>
> >> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
> >> ---
> >> v2: use the new ethtool speed/duplex validation functions and allow half
> >> duplex to be set
> >>
> >>  drivers/net/virtio_net.c | 41 +++++++++++++++++++++++++++++++++++++++++
> >>  1 file changed, 41 insertions(+)
> >>
> >> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> >> index 767ab11a6e9f..88fdb162c5f5 100644
> >> --- a/drivers/net/virtio_net.c
> >> +++ b/drivers/net/virtio_net.c
> >> @@ -146,6 +146,10 @@ struct virtnet_info {
> >>  	virtio_net_ctrl_ack ctrl_status;
> >>  	u8 ctrl_promisc;
> >>  	u8 ctrl_allmulti;
> >> +
> >> +	/* Ethtool settings */
> >> +	u8 duplex;
> >> +	u32 speed;
> >>  };
> >>  
> >>  struct padded_vnet_hdr {
> >> @@ -1376,6 +1380,39 @@ static void virtnet_get_channels(struct net_device *dev,
> >>  	channels->other_count = 0;
> >>  }
> >>  
> >> +static int virtnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> >> +{
> >> +	struct virtnet_info *vi = netdev_priv(dev);
> > 
> > need an empty line here.
> > 
> 
> The next line is a local variable declaration, you want a new line between
> the two local variable declarations ?

Oh, you are right.

> >> +	u32 speed = ethtool_cmd_speed(cmd);
> >> +
> >> +	/* don't allow custom speed and duplex */
> >> +	if (!ethtool_validate_speed(speed) ||
> >> +	    !ethtool_validate_duplex(cmd->duplex))
> >> +		return -EINVAL;
> > 
> > There's a problem here: rest of the fields are ignored.
> > Here's one way to validate user doesn't attempt to set them:
> > 
> 
> Hmm, yes, they'll silently get ignored without an error. Good point,
> and I'll modify as necessary.
> 
> Thanks!
> 
> > 	struct ethtool_cmd diff1 = cmd;
> > 	struct ethtool_cmd diff2 = {};
> > 
> > 	ethtool_cmd_speed_set(&diff1, 0);
> > 	diff1.duplex = 0;
> > 
> > 	if (memcmp(&diff1, &diff2, sizeof diff1))
> > 		return -EINVAL;
> > 
> > 
> >> +	vi->speed = speed;
> >> +	vi->duplex = cmd->duplex;
> >> +
> >> +	return 0;
> >> +}
> >> +
> >> +static int virtnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> >> +{
> >> +	struct virtnet_info *vi = netdev_priv(dev);
> >> +
> >> +	ethtool_cmd_speed_set(cmd, vi->speed);
> >> +	cmd->duplex = vi->duplex;
> > 
> > 
> > I think we should at least set port to PORT_OTHER.
> > 
> >> +
> >> +	return 0;
> >> +}
> >> +
> >> +static void virtnet_init_settings(struct net_device *dev)
> >> +{
> >> +	struct virtnet_info *vi = netdev_priv(dev);
> >> +
> >> +	vi->speed = SPEED_UNKNOWN;
> >> +	vi->duplex = DUPLEX_UNKNOWN;
> >> +}
> >> +
> >>  static const struct ethtool_ops virtnet_ethtool_ops = {
> >>  	.get_drvinfo = virtnet_get_drvinfo,
> >>  	.get_link = ethtool_op_get_link,
> >> @@ -1383,6 +1420,8 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
> >>  	.set_channels = virtnet_set_channels,
> >>  	.get_channels = virtnet_get_channels,
> >>  	.get_ts_info = ethtool_op_get_ts_info,
> >> +	.get_settings = virtnet_get_settings,
> >> +	.set_settings = virtnet_set_settings,
> >>  };
> >>  
> >>  #define MIN_MTU 68
> >> @@ -1855,6 +1894,8 @@ static int virtnet_probe(struct virtio_device *vdev)
> >>  	netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs);
> >>  	netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs);
> >>  
> >> +	virtnet_init_settings(dev);
> >> +
> >>  	err = register_netdev(dev);
> >>  	if (err) {
> >>  		pr_debug("virtio_net: registering device failed\n");
> >> -- 
> >> 2.4.3