diff mbox

[v11,17/22] vfio_platform: Updated to use vfio_set_irqs_validate_and_prepare()

Message ID 1478293856-8191-18-git-send-email-kwankhede@nvidia.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kirti Wankhede Nov. 4, 2016, 9:10 p.m. UTC 
Updated vfio_platform_common.c file to use
vfio_set_irqs_validate_and_prepare()

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Change-Id: Id87cd6b78ae901610b39bf957974baa6f40cd7b0
---
 drivers/vfio/platform/vfio_platform_common.c | 31 +++++++---------------------
 1 file changed, 8 insertions(+), 23 deletions(-)

Comments

Alexey Kardashevskiy Nov. 8, 2016, 8:52 a.m. UTC | #1 
On 05/11/16 08:10, Kirti Wankhede wrote:
> Updated vfio_platform_common.c file to use
> vfio_set_irqs_validate_and_prepare()
> 
> Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
> Signed-off-by: Neo Jia <cjia@nvidia.com>
> Change-Id: Id87cd6b78ae901610b39bf957974baa6f40cd7b0
> ---
>  drivers/vfio/platform/vfio_platform_common.c | 31 +++++++---------------------
>  1 file changed, 8 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
> index d78142830754..4c27f4be3c3d 100644
> --- a/drivers/vfio/platform/vfio_platform_common.c
> +++ b/drivers/vfio/platform/vfio_platform_common.c
> @@ -364,36 +364,21 @@ static long vfio_platform_ioctl(void *device_data,
>  		struct vfio_irq_set hdr;
>  		u8 *data = NULL;
>  		int ret = 0;
> +		size_t data_size = 0;
>  
>  		minsz = offsetofend(struct vfio_irq_set, count);
>  
>  		if (copy_from_user(&hdr, (void __user *)arg, minsz))
>  			return -EFAULT;
>  
> -		if (hdr.argsz < minsz)
> -			return -EINVAL;
> -
> -		if (hdr.index >= vdev->num_irqs)
> -			return -EINVAL;
> -
> -		if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |
> -				  VFIO_IRQ_SET_ACTION_TYPE_MASK))
> -			return -EINVAL;
> -
> -		if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
> -			size_t size;
> -
> -			if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
> -				size = sizeof(uint8_t);
> -			else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD)
> -				size = sizeof(int32_t);
> -			else
> -				return -EINVAL;
> -
> -			if (hdr.argsz - minsz < size)
> -				return -EINVAL;
> +		ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs,
> +						 vdev->num_irqs, &data_size);

The patch does not change this but I am still curious:

is not the second vdev->num_irqs supposed to be one of
VFIO_PCI_INTX_IRQ_INDEX..VFIO_PCI_NUM_IRQS, not the actual number of
interrupt vectors (as in vfio-pci)?




> +		if (ret)
> +			return ret;
>  
> -			data = memdup_user((void __user *)(arg + minsz), size);
> +		if (data_size) {
> +			data = memdup_user((void __user *)(arg + minsz),
> +					    data_size);
>  			if (IS_ERR(data))
>  				return PTR_ERR(data);
>  		}
>
Kirti Wankhede Nov. 8, 2016, 8:41 p.m. UTC | #2 
On 11/8/2016 2:22 PM, Alexey Kardashevskiy wrote:
> On 05/11/16 08:10, Kirti Wankhede wrote:
>> Updated vfio_platform_common.c file to use
>> vfio_set_irqs_validate_and_prepare()
>>
>> Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
>> Signed-off-by: Neo Jia <cjia@nvidia.com>
>> Change-Id: Id87cd6b78ae901610b39bf957974baa6f40cd7b0
>> ---
>>  drivers/vfio/platform/vfio_platform_common.c | 31 +++++++---------------------
>>  1 file changed, 8 insertions(+), 23 deletions(-)
>>
>> diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
>> index d78142830754..4c27f4be3c3d 100644
>> --- a/drivers/vfio/platform/vfio_platform_common.c
>> +++ b/drivers/vfio/platform/vfio_platform_common.c
>> @@ -364,36 +364,21 @@ static long vfio_platform_ioctl(void *device_data,
>>  		struct vfio_irq_set hdr;
>>  		u8 *data = NULL;
>>  		int ret = 0;
>> +		size_t data_size = 0;
>>  
>>  		minsz = offsetofend(struct vfio_irq_set, count);
>>  
>>  		if (copy_from_user(&hdr, (void __user *)arg, minsz))
>>  			return -EFAULT;
>>  
>> -		if (hdr.argsz < minsz)
>> -			return -EINVAL;
>> -
>> -		if (hdr.index >= vdev->num_irqs)
>> -			return -EINVAL;
>> -
>> -		if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |
>> -				  VFIO_IRQ_SET_ACTION_TYPE_MASK))
>> -			return -EINVAL;
>> -
>> -		if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
>> -			size_t size;
>> -
>> -			if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
>> -				size = sizeof(uint8_t);
>> -			else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD)
>> -				size = sizeof(int32_t);
>> -			else
>> -				return -EINVAL;
>> -
>> -			if (hdr.argsz - minsz < size)
>> -				return -EINVAL;
>> +		ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs,
>> +						 vdev->num_irqs, &data_size);
> 
> The patch does not change this but I am still curious:
> 
> is not the second vdev->num_irqs supposed to be one of
> VFIO_PCI_INTX_IRQ_INDEX..VFIO_PCI_NUM_IRQS, not the actual number of
> interrupt vectors (as in vfio-pci)?
> 
> 

Those are PCI specific. I don't think those counts are applicable here.

If you see the prototype, second argument and third argument have
different meaning.

int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr, int
num_irqs, int max_irq_type, size_t *data_size)

- num_irqs are number of irqs caller want to setup and
- max_irq_type is the one which is return to user in
VFIO_DEVICE_GET_INFO ioctl's info.num_irqs.

For platform these two are same.

Thanks,
Kirti

> 
> 
>> +		if (ret)
>> +			return ret;
>>  
>> -			data = memdup_user((void __user *)(arg + minsz), size);
>> +		if (data_size) {
>> +			data = memdup_user((void __user *)(arg + minsz),
>> +					    data_size);
>>  			if (IS_ERR(data))
>>  				return PTR_ERR(data);
>>  		}
>>
> 
>
diff mbox

Patch

diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index d78142830754..4c27f4be3c3d 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -364,36 +364,21 @@  static long vfio_platform_ioctl(void *device_data,
 		struct vfio_irq_set hdr;
 		u8 *data = NULL;
 		int ret = 0;
+		size_t data_size = 0;
 
 		minsz = offsetofend(struct vfio_irq_set, count);
 
 		if (copy_from_user(&hdr, (void __user *)arg, minsz))
 			return -EFAULT;
 
-		if (hdr.argsz < minsz)
-			return -EINVAL;
-
-		if (hdr.index >= vdev->num_irqs)
-			return -EINVAL;
-
-		if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |
-				  VFIO_IRQ_SET_ACTION_TYPE_MASK))
-			return -EINVAL;
-
-		if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
-			size_t size;
-
-			if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
-				size = sizeof(uint8_t);
-			else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD)
-				size = sizeof(int32_t);
-			else
-				return -EINVAL;
-
-			if (hdr.argsz - minsz < size)
-				return -EINVAL;
+		ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs,
+						 vdev->num_irqs, &data_size);
+		if (ret)
+			return ret;
 
-			data = memdup_user((void __user *)(arg + minsz), size);
+		if (data_size) {
+			data = memdup_user((void __user *)(arg + minsz),
+					    data_size);
 			if (IS_ERR(data))
 				return PTR_ERR(data);
 		}