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vsock/virtio: set SOCK_DONE on peer shutdown

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[ Upstream commit 42f5cda5eaf4396a939ae9bb43bb8d1d09c1b15c ]

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Barber 2019-06-14 23:42:37 -07:00 committed by Greg Kroah-Hartman
parent b86a5ccda5
commit 1b201b63b6
1 changed files with 3 additions and 1 deletions
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4
net/vmw_vsock/virtio_transport_common.c
View file

@ -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;