xen/pvcalls: implement socket command

Just reply with success to the other end for now. Delay the allocation
of the actual socket to bind and/or connect.

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 a92e81d..8f436e5 100644 (file)
--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -12,12 +12,17 @@
  * GNU General Public License for more details.
  */
 
+#include <linux/inet.h>
 #include <linux/kthread.h>
 #include <linux/list.h>
 #include <linux/radix-tree.h>
 #include <linux/module.h>
 #include <linux/semaphore.h>
 #include <linux/wait.h>
+#include <net/sock.h>
+#include <net/inet_common.h>
+#include <net/inet_connection_sock.h>
+#include <net/request_sock.h>
 
 #include <xen/events.h>
 #include <xen/grant_table.h>
@@ -52,6 +57,28 @@ struct pvcalls_fedata {
 static int pvcalls_back_socket(struct xenbus_device *dev,
                struct xen_pvcalls_request *req)
 {
+       struct pvcalls_fedata *fedata;
+       int ret;
+       struct xen_pvcalls_response *rsp;
+
+       fedata = dev_get_drvdata(&dev->dev);
+
+       if (req->u.socket.domain != AF_INET ||
+           req->u.socket.type != SOCK_STREAM ||
+           (req->u.socket.protocol != IPPROTO_IP &&
+            req->u.socket.protocol != AF_INET))
+               ret = -EAFNOSUPPORT;
+       else
+               ret = 0;
+
+       /* leave the actual socket allocation for later */
+
+       rsp = RING_GET_RESPONSE(&fedata->ring, fedata->ring.rsp_prod_pvt++);
+       rsp->req_id = req->req_id;
+       rsp->cmd = req->cmd;
+       rsp->u.socket.id = req->u.socket.id;
+       rsp->ret = ret;
+
        return 0;
 }