xen/pvcalls: implement listen command

Call inet_listen to implement the listen command.

Signed-off-by: Stefano Stabellini <stefano@aporeto.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
index a6b8468c13413a02b27e8d067ac6a2961c837336..648fa75f3cc204ee71f6cfee2ca5f9b583c45589 100644 (file)
--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -356,6 +356,27 @@ out:
 static int pvcalls_back_listen(struct xenbus_device *dev,
                               struct xen_pvcalls_request *req)
 {
+       struct pvcalls_fedata *fedata;
+       int ret = -EINVAL;
+       struct sockpass_mapping *map;
+       struct xen_pvcalls_response *rsp;
+
+       fedata = dev_get_drvdata(&dev->dev);
+
+       down(&fedata->socket_lock);
+       map = radix_tree_lookup(&fedata->socketpass_mappings, req->u.listen.id);
+       up(&fedata->socket_lock);
+       if (map == NULL)
+               goto out;
+
+       ret = inet_listen(map->sock, req->u.listen.backlog);
+
+out:
+       rsp = RING_GET_RESPONSE(&fedata->ring, fedata->ring.rsp_prod_pvt++);
+       rsp->req_id = req->req_id;
+       rsp->cmd = req->cmd;
+       rsp->u.listen.id = req->u.listen.id;
+       rsp->ret = ret;
        return 0;
 }