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Message-ID: <b7efba7a-0948-4b54-93cf-d676f9d5ea30@redhat.com>
Date:   Mon, 23 Oct 2023 09:35:24 +0200
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Subject: Re: [PATCH v4 1/4] vduse: validate block features only with block
 devices
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To:     Casey Schaufler <casey@schaufler-ca.com>, mst@redhat.com,
        jasowang@redhat.com, xuanzhuo@linux.alibaba.com,
        paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com,
        stephen.smalley.work@gmail.com, eparis@parisplace.org,
        xieyongji@bytedance.com, virtualization@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org,
        linux-security-module@vger.kernel.org, selinux@vger.kernel.org,
        david.marchand@redhat.com, lulu@redhat.com
References: <20231020155819.24000-1-maxime.coquelin@redhat.com>
 <20231020155819.24000-2-maxime.coquelin@redhat.com>
 <499aa925-f1fc-43de-ad5c-2fab28fb38e7@schaufler-ca.com>
From:   Maxime Coquelin <maxime.coquelin@redhat.com>
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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;
>