[Qemu-devel] [6533] qemu:virtio-net: Save status and add some save infrastructure ( Alex Williamson)

[Anthony Liguori <anthony@codemonkey.ws>]

Revision: 6533
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6533
Author:   aliguori
Date:     2009-02-05 22:36:04 +0000 (Thu, 05 Feb 2009)

Log Message:
-----------
qemu:virtio-net: Save status and add some save infrastructure (Alex Williamson)

The status register should probably be saved since its guest visible.
Also add a little bit if infrastructure for handling various save
revisions.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Modified Paths:
--------------
    trunk/hw/virtio-net.c

Modified: trunk/hw/virtio-net.c
===================================================================
--- trunk/hw/virtio-net.c	2009-02-05 22:33:36 UTC (rev 6532)
+++ trunk/hw/virtio-net.c	2009-02-05 22:36:04 UTC (rev 6533)
@@ -16,6 +16,8 @@
 #include "qemu-timer.h"
 #include "virtio-net.h"
 
+#define VIRTIO_NET_VM_VERSION    3
+
 typedef struct VirtIONet
 {
     VirtIODevice vdev;
@@ -292,13 +294,14 @@
     qemu_put_buffer(f, n->mac, 6);
     qemu_put_be32(f, n->tx_timer_active);
     qemu_put_be32(f, n->mergeable_rx_bufs);
+    qemu_put_be16(f, n->status);
 }
 
 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
 {
     VirtIONet *n = opaque;
 
-    if (version_id != 2)
+    if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION)
         return -EINVAL;
 
     virtio_load(&n->vdev, f);
@@ -307,6 +310,9 @@
     n->tx_timer_active = qemu_get_be32(f);
     n->mergeable_rx_bufs = qemu_get_be32(f);
 
+    if (version_id >= 3)
+        n->status = qemu_get_be16(f);
+
     if (n->tx_timer_active) {
         qemu_mod_timer(n->tx_timer,
                        qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL);
@@ -348,6 +354,6 @@
     n->tx_timer_active = 0;
     n->mergeable_rx_bufs = 0;
 
-    register_savevm("virtio-net", virtio_net_id++, 2,
+    register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
                     virtio_net_save, virtio_net_load, n);
 }