[v4] vhost: fix vhost user virtqueue not accessible

  Log feature is disabled in vhost user, so that log address was invalid
when checking. Check whether log address is valid can work around it.
Log address should also be translated in packed ring virtqueue.

Fixes: 04cfc7fdbfca ("vhost: translate incoming log address to gpa")

Signed-off-by: Marvin Liu <yong.liu@intel.com>
---
 lib/librte_vhost/vhost_user.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)
  

On 11/4/19 11:13 AM, Marvin Liu wrote:
> Log feature is disabled in vhost user, so that log address was invalid
> when checking. Check whether log address is valid can work around it.
> Log address should also be translated in packed ring virtqueue.
> 
> Fixes: 04cfc7fdbfca ("vhost: translate incoming log address to gpa")
> 
> Signed-off-by: Marvin Liu <yong.liu@intel.com>
> ---
>  lib/librte_vhost/vhost_user.c | 20 +++++++++++---------
>  1 file changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> index 61ef699ac..09e241305 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -641,11 +641,21 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
>  	struct vhost_vring_addr *addr = &vq->ring_addrs;
>  	uint64_t len, expected_len;
>  
> +	if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
> +		vq->log_guest_addr =
> +			translate_log_addr(dev, vq, addr->log_guest_addr);
> +		if (vq->log_guest_addr == 0) {
> +			RTE_LOG(DEBUG, VHOST_CONFIG,
> +				"(%d) failed to map log_guest_addr.\n",
> +				dev->vid);
> +			return dev;
> +		}
> +	}
> +
>  	if (vq_is_packed(dev)) {
>  		len = sizeof(struct vring_packed_desc) * vq->size;
>  		vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
>  			ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
> -		vq->log_guest_addr = 0;
>  		if (vq->desc_packed == NULL ||
>  				len != sizeof(struct vring_packed_desc) *
>  				vq->size) {
> @@ -741,14 +751,6 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
>  		vq->last_avail_idx = vq->used->idx;
>  	}
>  
> -	vq->log_guest_addr =
> -		translate_log_addr(dev, vq, addr->log_guest_addr);
> -	if (vq->log_guest_addr == 0) {
> -		RTE_LOG(DEBUG, VHOST_CONFIG,
> -			"(%d) failed to map log_guest_addr .\n",
> -			dev->vid);
> -		return dev;
> -	}
>  	vq->access_ok = 1;
>  
>  	VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
> 

Reviewed-by: Adrian Moreno <amorenoz@redhat.com>
  

On 11/4/19 9:47 AM, Adrian Moreno wrote:
> On 11/4/19 11:13 AM, Marvin Liu wrote:
>> Log feature is disabled in vhost user, so that log address was invalid
>> when checking. Check whether log address is valid can work around it.
>> Log address should also be translated in packed ring virtqueue.
>>
>> Fixes: 04cfc7fdbfca ("vhost: translate incoming log address to gpa")
>>
>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
>> ---
>>  lib/librte_vhost/vhost_user.c | 20 +++++++++++---------
>>  1 file changed, 11 insertions(+), 9 deletions(-)
>>
>> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
>> index 61ef699ac..09e241305 100644
>> --- a/lib/librte_vhost/vhost_user.c
>> +++ b/lib/librte_vhost/vhost_user.c
>> @@ -641,11 +641,21 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
>>  	struct vhost_vring_addr *addr = &vq->ring_addrs;
>>  	uint64_t len, expected_len;
>>  
>> +	if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
>> +		vq->log_guest_addr =
>> +			translate_log_addr(dev, vq, addr->log_guest_addr);
>> +		if (vq->log_guest_addr == 0) {
>> +			RTE_LOG(DEBUG, VHOST_CONFIG,
>> +				"(%d) failed to map log_guest_addr.\n",
>> +				dev->vid);
>> +			return dev;
>> +		}
>> +	}
>> +
>>  	if (vq_is_packed(dev)) {
>>  		len = sizeof(struct vring_packed_desc) * vq->size;
>>  		vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
>>  			ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
>> -		vq->log_guest_addr = 0;
>>  		if (vq->desc_packed == NULL ||
>>  				len != sizeof(struct vring_packed_desc) *
>>  				vq->size) {
>> @@ -741,14 +751,6 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
>>  		vq->last_avail_idx = vq->used->idx;
>>  	}
>>  
>> -	vq->log_guest_addr =
>> -		translate_log_addr(dev, vq, addr->log_guest_addr);
>> -	if (vq->log_guest_addr == 0) {
>> -		RTE_LOG(DEBUG, VHOST_CONFIG,
>> -			"(%d) failed to map log_guest_addr .\n",
>> -			dev->vid);
>> -		return dev;
>> -	}
>>  	vq->access_ok = 1;
>>  
>>  	VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
>>
> 
> Reviewed-by: Adrian Moreno <amorenoz@redhat.com>
> 

Thanks Marvin for the fix, and Adrian for the review.

It looks good to me too now:
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Maxime
  

On 11/4/19 11:13 AM, Marvin Liu wrote:
> Log feature is disabled in vhost user, so that log address was invalid
> when checking. Check whether log address is valid can work around it.
> Log address should also be translated in packed ring virtqueue.
> 
> Fixes: 04cfc7fdbfca ("vhost: translate incoming log address to gpa")
> 
> Signed-off-by: Marvin Liu <yong.liu@intel.com>
> ---
>  lib/librte_vhost/vhost_user.c | 20 +++++++++++---------
>  1 file changed, 11 insertions(+), 9 deletions(-)

Applied to dpdk-next-virtio/master.

Thanks,
Maxime