[v4] vduse: add support for networking devices

[PATCH v4 1/4] vduse: validate block features only with block devices

Posted by Maxime Coquelin 2 years, 1 month ago

This patch is preliminary work to enable network device
type support to VDUSE.

As VIRTIO_BLK_F_CONFIG_WCE shares the same value as
VIRTIO_NET_F_HOST_TSO4, we need to restrict its check
to Virtio-blk device type.

Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/vdpa/vdpa_user/vduse_dev.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index df7869537ef1..5b3879976b3d 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1662,13 +1662,14 @@ static bool device_is_allowed(u32 device_id)
 	return false;
 }
 
-static bool features_is_valid(u64 features)
+static bool features_is_valid(struct vduse_dev_config *config)
 {
-	if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
+	if (!(config->features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
 		return false;
 
 	/* Now we only support read-only configuration space */
-	if (features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE))
+	if ((config->device_id == VIRTIO_ID_BLOCK) &&
+			(config->features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE)))
 		return false;
 
 	return true;
@@ -1695,7 +1696,7 @@ static bool vduse_validate_config(struct vduse_dev_config *config)
 	if (!device_is_allowed(config->device_id))
 		return false;
 
-	if (!features_is_valid(config->features))
+	if (!features_is_valid(config))
 		return false;
 
 	return true;
-- 
2.41.0

Re: [PATCH v4 1/4] vduse: validate block features only with block devices

Posted by Casey Schaufler 2 years, 1 month ago

On 10/20/2023 8:58 AM, Maxime Coquelin wrote:
> This patch is preliminary work to enable network device
> type support to VDUSE.
>
> As VIRTIO_BLK_F_CONFIG_WCE shares the same value as
> VIRTIO_NET_F_HOST_TSO4, we need to restrict its check
> to Virtio-blk device type.
>
> Acked-by: Jason Wang <jasowang@redhat.com>
> Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  drivers/vdpa/vdpa_user/vduse_dev.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
> index df7869537ef1..5b3879976b3d 100644
> --- a/drivers/vdpa/vdpa_user/vduse_dev.c
> +++ b/drivers/vdpa/vdpa_user/vduse_dev.c
> @@ -1662,13 +1662,14 @@ static bool device_is_allowed(u32 device_id)
>  	return false;
>  }
>  
> -static bool features_is_valid(u64 features)
> +static bool features_is_valid(struct vduse_dev_config *config)

This should either be features_are_valid() or feature_is_valid().
Correct pluralization is important in the English language.

>  {
> -	if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
> +	if (!(config->features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
>  		return false;
>  
>  	/* Now we only support read-only configuration space */
> -	if (features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE))
> +	if ((config->device_id == VIRTIO_ID_BLOCK) &&
> +			(config->features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE)))
>  		return false;
>  
>  	return true;
> @@ -1695,7 +1696,7 @@ static bool vduse_validate_config(struct vduse_dev_config *config)
>  	if (!device_is_allowed(config->device_id))
>  		return false;
>  
> -	if (!features_is_valid(config->features))
> +	if (!features_is_valid(config))
>  		return false;
>  
>  	return true;

Re: [PATCH v4 1/4] vduse: validate block features only with block devices

Posted by Maxime Coquelin 2 years, 1 month ago


On 10/21/23 00:07, Casey Schaufler wrote:
> On 10/20/2023 8:58 AM, Maxime Coquelin wrote:
>> This patch is preliminary work to enable network device
>> type support to VDUSE.
>>
>> As VIRTIO_BLK_F_CONFIG_WCE shares the same value as
>> VIRTIO_NET_F_HOST_TSO4, we need to restrict its check
>> to Virtio-blk device type.
>>
>> Acked-by: Jason Wang <jasowang@redhat.com>
>> Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>>   drivers/vdpa/vdpa_user/vduse_dev.c | 9 +++++----
>>   1 file changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
>> index df7869537ef1..5b3879976b3d 100644
>> --- a/drivers/vdpa/vdpa_user/vduse_dev.c
>> +++ b/drivers/vdpa/vdpa_user/vduse_dev.c
>> @@ -1662,13 +1662,14 @@ static bool device_is_allowed(u32 device_id)
>>   	return false;
>>   }
>>   
>> -static bool features_is_valid(u64 features)
>> +static bool features_is_valid(struct vduse_dev_config *config)
> 
> This should either be features_are_valid() or feature_is_valid().
> Correct pluralization is important in the English language.

Indeed, I will change to features_are_valid() in next revision.

Thanks,
Maxime

>>   {
>> -	if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
>> +	if (!(config->features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
>>   		return false;
>>   
>>   	/* Now we only support read-only configuration space */
>> -	if (features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE))
>> +	if ((config->device_id == VIRTIO_ID_BLOCK) &&
>> +			(config->features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE)))
>>   		return false;
>>   
>>   	return true;
>> @@ -1695,7 +1696,7 @@ static bool vduse_validate_config(struct vduse_dev_config *config)
>>   	if (!device_is_allowed(config->device_id))
>>   		return false;
>>   
>> -	if (!features_is_valid(config->features))
>> +	if (!features_is_valid(config))
>>   		return false;
>>   
>>   	return true;
>