[v1] vsock: MSG_ZEROCOPY flag support

[RFC PATCH v1 01/12] vsock: check error queue to set EPOLLERR

Posted by Arseniy Krasnov 2 years, 7 months ago

If socket's error queue is not empty, EPOLLERR must be set.

Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
---
 net/vmw_vsock/af_vsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 19aea7cba26e..b5e51ef4a74c 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1026,7 +1026,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock,
 	poll_wait(file, sk_sleep(sk), wait);
 	mask = 0;
 
-	if (sk->sk_err)
+	if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
 		/* Signify that there has been an error on this socket. */
 		mask |= EPOLLERR;
 
-- 
2.25.1

Re: [RFC PATCH v1 01/12] vsock: check error queue to set EPOLLERR

Posted by Stefano Garzarella 2 years, 6 months ago

On Mon, Feb 06, 2023 at 06:53:22AM +0000, Arseniy Krasnov wrote:
>If socket's error queue is not empty, EPOLLERR must be set.

Could this patch go regardless of this series?

Can you explain (even in the commit message) what happens without this
patch?

Thanks,
Stefano

>
>Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>---
> net/vmw_vsock/af_vsock.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
>index 19aea7cba26e..b5e51ef4a74c 100644
>--- a/net/vmw_vsock/af_vsock.c
>+++ b/net/vmw_vsock/af_vsock.c
>@@ -1026,7 +1026,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock,
> 	poll_wait(file, sk_sleep(sk), wait);
> 	mask = 0;
>
>-	if (sk->sk_err)
>+	if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
> 		/* Signify that there has been an error on this socket. */
> 		mask |= EPOLLERR;
>
>-- 
>2.25.1

Re: [RFC PATCH v1 01/12] vsock: check error queue to set EPOLLERR

Posted by Krasnov Arseniy 2 years, 6 months ago

On 16.02.2023 16:40, Stefano Garzarella wrote:
> On Mon, Feb 06, 2023 at 06:53:22AM +0000, Arseniy Krasnov wrote:
>> If socket's error queue is not empty, EPOLLERR must be set.
> 
> Could this patch go regardless of this series?
> 
> Can you explain (even in the commit message) what happens without this
> patch?

Sure! Thanks

> 
> Thanks,
> Stefano
> 
>>
>> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>> ---
>> net/vmw_vsock/af_vsock.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
>> index 19aea7cba26e..b5e51ef4a74c 100644
>> --- a/net/vmw_vsock/af_vsock.c
>> +++ b/net/vmw_vsock/af_vsock.c
>> @@ -1026,7 +1026,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock,
>>     poll_wait(file, sk_sleep(sk), wait);
>>     mask = 0;
>>
>> -    if (sk->sk_err)
>> +    if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
>>         /* Signify that there has been an error on this socket. */
>>         mask |= EPOLLERR;
>>
>> -- 
>> 2.25.1
>