net/colo.c: Make vnet_hdr_len as packet property

We can use this property flush and send packet with vnet_hdr_len.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

net/colo-compare.c

@@ -121,9 +121,13 @@ static int packet_enqueue(CompareState *s, int mode)
     Connection *conn;
 
     if (mode == PRIMARY_IN) {
-        pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len);
+        pkt = packet_new(s->pri_rs.buf,
+                         s->pri_rs.packet_len,
+                         s->pri_rs.vnet_hdr_len);
     } else {
-        pkt = packet_new(s->sec_rs.buf, s->sec_rs.packet_len);
+        pkt = packet_new(s->sec_rs.buf,
+                         s->sec_rs.packet_len,
+                         s->sec_rs.vnet_hdr_len);
     }
 
     if (parse_packet_early(pkt)) {

net/colo.c

@@ -153,13 +153,14 @@ void connection_destroy(void *opaque)
     g_slice_free(Connection, conn);
 }
 
-Packet *packet_new(const void *data, int size)
+Packet *packet_new(const void *data, int size, int vnet_hdr_len)
 {
     Packet *pkt = g_slice_new(Packet);
 
     pkt->data = g_memdup(data, size);
     pkt->size = size;
     pkt->creation_ms = qemu_clock_get_ms(QEMU_CLOCK_HOST);
+    pkt->vnet_hdr_len = vnet_hdr_len;
 
     return pkt;
 }

net/colo.h

@@ -43,6 +43,8 @@ typedef struct Packet {
     int size;
     /* Time of packet creation, in wall clock ms */
     int64_t creation_ms;
+    /* Get vnet_hdr_len from filter */
+    uint32_t vnet_hdr_len;
 } Packet;
 
 typedef struct ConnectionKey {
@@ -82,7 +84,7 @@ Connection *connection_get(GHashTable *connection_track_table,
                            ConnectionKey *key,
                            GQueue *conn_list);
 void connection_hashtable_reset(GHashTable *connection_track_table);
-Packet *packet_new(const void *data, int size);
+Packet *packet_new(const void *data, int size, int vnet_hdr_len);
 void packet_destroy(void *opaque, void *user_data);
 
 #endif /* QEMU_COLO_PROXY_H */

net/filter-rewriter.c

@@ -158,7 +158,7 @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf,
     char *buf = g_malloc0(size);
 
     iov_to_buf(iov, iovcnt, 0, buf, size);
-    pkt = packet_new(buf, size);
+    pkt = packet_new(buf, size, 0);
     g_free(buf);
 
     /*