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Subject[PATCH] vsock/virtio: set SOCK_DONE on peer shutdown
Date
Set the SOCK_DONE flag to match the TCP_CLOSING state when a peer has
shut down and there is nothing left to read.

This fixes the following bug:
1) Peer sends SHUTDOWN(RDWR).
2) Socket enters TCP_CLOSING but SOCK_DONE is not set.
3) read() returns -ENOTCONN until close() is called, then returns 0.

Signed-off-by: Stephen Barber <smbarber@chromium.org>
---
net/vmw_vsock/virtio_transport_common.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index f3f3d06cb6d8..e30f53728725 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -871,8 +871,10 @@ virtio_transport_recv_connected(struct sock *sk,
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SHUTDOWN_SEND)
vsk->peer_shutdown |= SEND_SHUTDOWN;
if (vsk->peer_shutdown == SHUTDOWN_MASK &&
- vsock_stream_has_data(vsk) <= 0)
+ vsock_stream_has_data(vsk) <= 0) {
+ sock_set_flag(sk, SOCK_DONE);
sk->sk_state = TCP_CLOSING;
+ }
if (le32_to_cpu(pkt->hdr.flags))
sk->sk_state_change(sk);
break;
--
2.22.0.410.gd8fdbe21b5-goog
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