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-rw-r--r--net/vmw_vsock/af_vsock.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index d2834047c6db..2828734b7bcf 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -431,6 +431,18 @@ int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk)
unsigned int remote_cid = vsk->remote_addr.svm_cid;
int ret;
+ /* If the packet is coming with the source and destination CIDs higher
+ * than VMADDR_CID_HOST, then a vsock channel where all the packets are
+ * forwarded to the host should be established. Then the host will
+ * need to forward the packets to the guest.
+ *
+ * The flag is set on the (listen) receive path (psk is not NULL). On
+ * the connect path the flag can be set by the user space application.
+ */
+ if (psk && vsk->local_addr.svm_cid > VMADDR_CID_HOST &&
+ vsk->remote_addr.svm_cid > VMADDR_CID_HOST)
+ vsk->remote_addr.svm_flags |= VMADDR_FLAG_TO_HOST;
+
switch (sk->sk_type) {
case SOCK_DGRAM:
new_transport = transport_dgram;