[dpdk-dev] [PATCH v3 6/8] net/virtio: adapt Virtio-user status size

[Xia, Chenbo]

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin at redhat.com>
> Sent: Wednesday, September 30, 2020 12:14 AM
> To: dev at dpdk.org; Xia, Chenbo <chenbo.xia at intel.com>; Fu, Patrick
> <patrick.fu at intel.com>; amorenoz at redhat.com
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>
> Subject: [PATCH v3 6/8] net/virtio: adapt Virtio-user status size
> 
> Set proper payload size for set/get status message. The payload
> size varies according to backend types.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> Signed-off-by: Patrick Fu <patrick.fu at intel.com>
> ---
>  .../net/virtio/virtio_user/virtio_user_dev.c  | 34 +++++++++++++------
>  1 file changed, 23 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index d7cd6b0346..ded44bf32b 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -784,11 +784,15 @@ virtio_user_send_status_update(struct
> virtio_user_dev *dev, uint8_t status)
>  	int ret;
>  	uint64_t arg = status;
> 
> -	/* Vhost-user only for now */
> -	if (dev->backend_type != VIRTIO_USER_BACKEND_VHOST_USER)
> +	if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_USER)
> +		ret = dev->ops->send_request(dev,
> +				VHOST_USER_SET_STATUS, &arg);
> +	else if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_VDPA)
> +		ret = dev->ops->send_request(dev,
> +				VHOST_USER_SET_STATUS, &status);
> +	else
>  		return 0;
> 
> -	ret = dev->ops->send_request(dev, VHOST_USER_SET_STATUS, &arg);
>  	if (ret) {
>  		PMD_INIT_LOG(ERR, "VHOST_USER_SET_STATUS failed (%d): %s", ret,
>  			     strerror(errno));
> @@ -802,24 +806,32 @@ int
>  virtio_user_update_status(struct virtio_user_dev *dev)
>  {
>  	uint64_t ret;
> +	uint8_t status;
>  	int err;
> 
> -	/* Vhost-user only for now */
> -	if (dev->backend_type != VIRTIO_USER_BACKEND_VHOST_USER)
> +	if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_USER) {
> +		err = dev->ops->send_request(dev, VHOST_USER_GET_STATUS, &ret);
> +		if (!err && ret > UINT8_MAX) {
> +			PMD_INIT_LOG(ERR, "Invalid VHOST_USER_GET_STATUS "
> +					"response 0x%" PRIx64 "\n", ret);
> +			return -1;
> +		}
> +
> +		status = ret;
> +	} else if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_VDPA) {
> +		err = dev->ops->send_request(dev, VHOST_USER_GET_STATUS,
> +				&status);
> +	} else {
>  		return 0;
> +	}
> 
> -	err = dev->ops->send_request(dev, VHOST_USER_GET_STATUS, &ret);
>  	if (err) {
>  		PMD_INIT_LOG(ERR, "VHOST_USER_GET_STATUS failed (%d): %s", err,
>  			     strerror(errno));
>  		return -1;
>  	}
> -	if (ret > UINT8_MAX) {
> -		PMD_INIT_LOG(ERR, "Invalid VHOST_USER_GET_STATUS response 0x%"
> PRIx64 "\n", ret);
> -		return -1;
> -	}
> 
> -	dev->status = ret;
> +	dev->status = status;
>  	PMD_INIT_LOG(DEBUG, "Updated Device Status(0x%08x):\n"
>  			"\t-RESET: %u\n"
>  			"\t-ACKNOWLEDGE: %u\n"
> --
> 2.26.2

Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>