[dpdk-dev] [PATCH v4]net/virtio: add mtu set in virtio

[Dey, Souvik]

Hi Liu,

Yes agreed your comment. I will definitely remove the declaration as it is not really required. 
 So the latest patch will look like this . Yes I did rush a bit to submit the patch last will correct my suite. So sending the patch in a reply if we have more comments we can take a look and they re-submit the final reviewed patch. Thanks for the help though. 

---
 drivers/net/virtio/virtio_ethdev.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 07d6449..da16ad4 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c

+static int
+virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	if (mtu < VIRTIO_MIN_RX_BUFSIZE || mtu > VIRTIO_MAX_RX_PKTLEN) {
+		PMD_INIT_LOG(ERR, "Mtu should be between 64 and 9728\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
 /*
  * dev_ops for virtio, bare necessities for basic operation
  */
@@ -664,6 +675,7 @@ static const struct eth_dev_ops virtio_eth_dev_ops = {
 	.promiscuous_disable     = virtio_dev_promiscuous_disable,
 	.allmulticast_enable     = virtio_dev_allmulticast_enable,
 	.allmulticast_disable    = virtio_dev_allmulticast_disable,
+	.mtu_set                 = virtio_mtu_set,
 
 	.dev_infos_get           = virtio_dev_info_get,
 	.stats_get               = virtio_dev_stats_get,
--

--
Regards,
Souvik

-----Original Message-----
From: Yuanhan Liu [mailto:yuanhan.liu at linux.intel.com] 
Sent: Friday, September 9, 2016 3:00 AM
To: Dey, Souvik <sodey at sonusnet.com>
Cc: dev at dpdk.org; stephen at networkplumber.org
Subject: Re: [PATCH v4]net/virtio: add mtu set in virtio

On Wed, Sep 07, 2016 at 04:21:30AM +0000, Dey, Souvik wrote:
> Hi Liu,
> 	Submitted the version 4 of the patch as you suggested ,

Your patch is looking much better. But not really, you ignored few of my comments.

> and have removed the Reviewed by line.
> I have still kept the function definition as to follow the same suit as we have done for other eth_dev_ops.

That's because most of the method implementions are after the reference, thus the declaration is needed.

For your case, I see no good reason to do that. BTW, if you disagree with my comment, you shoud made a reply, instead of rushing to sending a new version.

> --
> Regards,
> Souvik
> 
> -----Original Message-----
> From: Dey, Souvik
> Sent: Wednesday, September 7, 2016 12:19 AM
> To: dev at dpdk.org; stephen at networkplumber.org; 
> yuanhan.liu at linux.intel.com
> Cc: Dey, Souvik <sodey at sonusnet.com>
> Subject: [PATCH v4]net/virtio: add mtu set in virtio
> 
> 
> Virtio interfaces should also support setting of mtu, as in case of cloud it is expected to have the consistent mtu across the infrastructure that the dhcp server sends and not hardcoded to 1500(default).
> 
> Changes in v4: Incorporated review comments.
> Changes in v3: Corrected few style errors as reported by sys-stv.
> Changes in v2: Incorporated review comments.

DPDK prefers to put the change log to ...
> 
> Signed-off-by: Souvik Dey <sodey at sonusnet.com>
> 
> ---

... here.

So that they will be showed in mailing list (for review), but they will be gone after apply. In another word, we don't like to see those change log in git history, but we'd like to see them while review.

>  drivers/net/virtio/virtio_ethdev.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/net/virtio/virtio_ethdev.c 
> b/drivers/net/virtio/virtio_ethdev.c
> index 07d6449..da16ad4 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -92,6 +92,7 @@ static void virtio_mac_addr_add(struct rte_eth_dev *dev,  static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);  static void virtio_mac_addr_set(struct rte_eth_dev *dev,
>  				struct ether_addr *mac_addr);
> +static int  virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
>  
>  static int virtio_dev_queue_stats_mapping_set(
>  	__rte_unused struct rte_eth_dev *eth_dev, @@ -652,6 +653,16 @@ virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
>  		PMD_INIT_LOG(ERR, "Failed to disable allmulticast");  }
>  
> +static int
> +virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) {
> +	struct virtio_hw *hw = dev->data->dev_private;
> +	if (mtu < VIRTIO_MIN_RX_BUFSIZE || mtu > VIRTIO_MAX_RX_PKTLEN) {
> +		PMD_INIT_LOG(ERR, "Mtu should be between 64 and 9728\n");

I still saw those numbers.

	--yliu