On Thu, Mar 09, 2023 at 01:13:51PM +0300, Arseniy Krasnov wrote:
>This returns behaviour of SOCK_STREAM read as before skbuff usage. When
So we need the Fixes tag:
Fixes: 71dc9ec9ac7d ("virtio/vsock: replace virtio_vsock_pkt with sk_buff")
The patch LGTM!
Stefano
>copying to user fails current skbuff won't be dropped, but returned to
>sockets's queue. Technically instead of 'skb_dequeue()', 'skb_peek()' is
>called and when skbuff becomes empty, it is removed from queue by
>'__skb_unlink()'.
>
>Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>---
> net/vmw_vsock/virtio_transport_common.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
>diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
>index 9a411475e201..6564192e7f20 100644
>--- a/net/vmw_vsock/virtio_transport_common.c
>+++ b/net/vmw_vsock/virtio_transport_common.c
>@@ -364,7 +364,7 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk,
>
> spin_lock_bh(&vvs->rx_lock);
> while (total < len && !skb_queue_empty(&vvs->rx_queue)) {
>- skb = __skb_dequeue(&vvs->rx_queue);
>+ skb = skb_peek(&vvs->rx_queue);
>
> bytes = len - total;
> if (bytes > skb->len)
>@@ -388,9 +388,8 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk,
> u32 pkt_len = le32_to_cpu(virtio_vsock_hdr(skb)->len);
>
> virtio_transport_dec_rx_pkt(vvs, pkt_len);
>+ __skb_unlink(skb, &vvs->rx_queue);
> consume_skb(skb);
>- } else {
>- __skb_queue_head(&vvs->rx_queue, skb);
> }
> }
>
>--
>2.25.1
>