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-rw-r--r--hw/virtio-net.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index bfe1366c5..4acdd1201 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -16,7 +16,7 @@
#include "qemu-timer.h"
#include "virtio-net.h"
-#define VIRTIO_NET_VM_VERSION 10
+#define VIRTIO_NET_VM_VERSION 11
#define MAC_TABLE_ENTRIES 64
#define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
@@ -33,6 +33,7 @@ typedef struct VirtIONet
QEMUTimer *tx_timer;
int tx_timer_active;
uint32_t has_vnet_hdr;
+ uint8_t has_ufo;
struct {
VirtQueueElement elem;
ssize_t len;
@@ -134,6 +135,16 @@ static int peer_has_vnet_hdr(VirtIONet *n)
return n->has_vnet_hdr;
}
+static int peer_has_ufo(VirtIONet *n)
+{
+ if (!peer_has_vnet_hdr(n))
+ return 0;
+
+ n->has_ufo = tap_has_ufo(n->vc->peer);
+
+ return n->has_ufo;
+}
+
static uint32_t virtio_net_get_features(VirtIODevice *vdev)
{
VirtIONet *n = to_virtio_net(vdev);
@@ -158,7 +169,7 @@ static uint32_t virtio_net_get_features(VirtIODevice *vdev)
features |= (1 << VIRTIO_NET_F_GUEST_TSO6);
features |= (1 << VIRTIO_NET_F_GUEST_ECN);
- if (tap_has_ufo(n->vc->peer)) {
+ if (peer_has_ufo(n)) {
features |= (1 << VIRTIO_NET_F_GUEST_UFO);
features |= (1 << VIRTIO_NET_F_HOST_UFO);
}
@@ -697,6 +708,7 @@ static void virtio_net_save(QEMUFile *f, void *opaque)
qemu_put_byte(f, n->nomulti);
qemu_put_byte(f, n->nouni);
qemu_put_byte(f, n->nobcast);
+ qemu_put_byte(f, n->has_ufo);
}
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
@@ -771,6 +783,13 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
n->nobcast = qemu_get_byte(f);
}
+ if (version_id >= 11) {
+ if (qemu_get_byte(f) && !peer_has_ufo(n)) {
+ qemu_error("virtio-net: saved image requires TUN_F_UFO support\n");
+ return -1;
+ }
+ }
+
/* Find the first multicast entry in the saved MAC filter */
for (i = 0; i < n->mac_table.in_use; i++) {
if (n->mac_table.macs[i * ETH_ALEN] & 1) {