Re: [PATCH 3/3] vhost: fix null pointer checking

[Ye Xiaolong <xiaolong.ye@intel.com>]

Hi, Tiwei,

On 04/04, Tiwei Bie wrote:
[snip]
>> @@ -515,7 +515,7 @@ rte_vhost_get_ifname(int vid, char *buf, size_t len)
>>  {
>>  	struct virtio_net *dev = get_device(vid);
>>  
>> -	if (dev == NULL)
>> +	if (dev == NULL || !buf)
>
>It would be better to do the check in this way: (!dev || !buf)
>for consistency.
>

According to DPDK coding conventions 1.8.1 on NULL pointers [1], shouldn't it be

if (dev == NULL || buf == NULL)?

[1] https://doc.dpdk.org/guides/contributing/coding_style.html#null-pointers

Thanks,
Xiaolong
>Thanks for the work!
>Tiwei
>
>
>>  		return -1;
>>  
>>  	len = RTE_MIN(len, sizeof(dev->ifname));
>> @@ -532,7 +532,7 @@ rte_vhost_get_negotiated_features(int vid, uint64_t *features)
>>  	struct virtio_net *dev;
>>  
>>  	dev = get_device(vid);
>> -	if (!dev)
>> +	if (!dev || !features)
>>  		return -1;
>>  
>>  	*features = dev->features;
>> @@ -547,7 +547,7 @@ rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem)
>>  	size_t size;
>>  
>>  	dev = get_device(vid);
>> -	if (!dev)
>> +	if (!dev || !mem)
>>  		return -1;
>>  
>>  	size = dev->mem->nregions * sizeof(struct rte_vhost_mem_region);
>> @@ -570,7 +570,7 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
>>  	struct vhost_virtqueue *vq;
>>  
>>  	dev = get_device(vid);
>> -	if (!dev)
>> +	if (!dev || !vring)
>>  		return -1;
>>  
>>  	if (vring_idx >= VHOST_MAX_VRING)
>> @@ -763,7 +763,7 @@ int rte_vhost_get_log_base(int vid, uint64_t *log_base,
>>  {
>>  	struct virtio_net *dev = get_device(vid);
>>  
>> -	if (!dev)
>> +	if (!dev || !log_base || !log_size)
>>  		return -1;
>>  
>>  	*log_base = dev->log_base;
>> @@ -777,7 +777,7 @@ int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
>>  {
>>  	struct virtio_net *dev = get_device(vid);
>>  
>> -	if (!dev)
>> +	if (!dev || !last_avail_idx || !last_used_idx)
>>  		return -1;
>>  
>>  	*last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx;
>> @@ -805,7 +805,7 @@ int rte_vhost_extern_callback_register(int vid,
>>  {
>>  	struct virtio_net *dev = get_device(vid);
>>  
>> -	if (!dev)
>> +	if (!dev || !ops)
>>  		return -1;
>>  
>>  	dev->extern_ops = *ops;
>> -- 
>> 2.17.1
>>