@@ -73,6 +73,7 @@ typedef struct CompareState {
CharBackend chr_out;
SocketReadState pri_rs;
SocketReadState sec_rs;
+ bool vnet_hdr;
/* connection list: the connections belonged to this NIC could be found
* in this list.
@@ -97,9 +98,10 @@ enum {
SECONDARY_IN,
};
-static int compare_chr_send(CharBackend *out,
+static int compare_chr_send(CompareState *s,
const uint8_t *buf,
- uint32_t size);
+ uint32_t size,
+ uint32_t vnet_hdr_len);
static gint seq_sorter(Packet *a, Packet *b, gpointer data)
{
@@ -472,7 +474,10 @@ static void colo_compare_connection(void *opaque, void *user_data)
}
if (result) {
- ret = compare_chr_send(&s->chr_out, pkt->data, pkt->size);
+ ret = compare_chr_send(s,
+ pkt->data,
+ pkt->size,
+ pkt->vnet_hdr_len);
if (ret < 0) {
error_report("colo_send_primary_packet failed");
}
@@ -493,9 +498,10 @@ static void colo_compare_connection(void *opaque, void *user_data)
}
}
-static int compare_chr_send(CharBackend *out,
+static int compare_chr_send(CompareState *s,
const uint8_t *buf,
- uint32_t size)
+ uint32_t size,
+ uint32_t vnet_hdr_len)
{
int ret = 0;
uint32_t len = htonl(size);
@@ -504,12 +510,24 @@ static int compare_chr_send(CharBackend *out,
return 0;
}
- ret = qemu_chr_fe_write_all(out, (uint8_t *)&len, sizeof(len));
+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));
if (ret != sizeof(len)) {
goto err;
}
- ret = qemu_chr_fe_write_all(out, (uint8_t *)buf, size);
+ if (s->vnet_hdr) {
+ /*
+ * We send vnet header len make other module(like filter-redirector)
+ * know how to parse net packet correctly.
+ */
+ len = htonl(vnet_hdr_len);
+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));
+ if (ret != sizeof(len)) {
+ goto err;
+ }
+ }
+
+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size);
if (ret != size) {
goto err;
}
@@ -646,13 +664,32 @@ static void compare_set_outdev(Object *obj, const char *value, Error **errp)
s->outdev = g_strdup(value);
}
+static bool compare_get_vnet_hdr(Object *obj, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ return s->vnet_hdr;
+}
+
+static void compare_set_vnet_hdr(Object *obj,
+ bool value,
+ Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ s->vnet_hdr = value;
+}
+
static void compare_pri_rs_finalize(SocketReadState *pri_rs)
{
CompareState *s = container_of(pri_rs, CompareState, pri_rs);
if (packet_enqueue(s, PRIMARY_IN)) {
trace_colo_compare_main("primary: unsupported packet in");
- compare_chr_send(&s->chr_out, pri_rs->buf, pri_rs->packet_len);
+ compare_chr_send(s,
+ pri_rs->buf,
+ pri_rs->packet_len,
+ pri_rs->vnet_hdr_len);
} else {
/* compare connection */
g_queue_foreach(&s->conn_list, colo_compare_connection, s);
@@ -735,7 +772,9 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp)
}
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize);
+ s->pri_rs.vnet_hdr = s->vnet_hdr;
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
+ s->sec_rs.vnet_hdr = s->vnet_hdr;
g_queue_init(&s->conn_list);
@@ -761,7 +800,10 @@ static void colo_flush_packets(void *opaque, void *user_data)
while (!g_queue_is_empty(&conn->primary_list)) {
pkt = g_queue_pop_head(&conn->primary_list);
- compare_chr_send(&s->chr_out, pkt->data, pkt->size);
+ compare_chr_send(s,
+ pkt->data,
+ pkt->size,
+ pkt->vnet_hdr_len);
packet_destroy(pkt, NULL);
}
while (!g_queue_is_empty(&conn->secondary_list)) {
@@ -779,6 +821,8 @@ static void colo_compare_class_init(ObjectClass *oc, void *data)
static void colo_compare_init(Object *obj)
{
+ CompareState *s = COLO_COMPARE(obj);
+
object_property_add_str(obj, "primary_in",
compare_get_pri_indev, compare_set_pri_indev,
NULL);
@@ -788,6 +832,14 @@ static void colo_compare_init(Object *obj)
object_property_add_str(obj, "outdev",
compare_get_outdev, compare_set_outdev,
NULL);
+ /*
+ * The vnet_hdr is disabled by default, if you want to enable
+ * this option, you must enable all the option on related modules
+ * (like other filter or colo-compare).
+ */
+ s->vnet_hdr = false;
+ object_property_add_bool(obj, "vnet_hdr_support", compare_get_vnet_hdr,
+ compare_set_vnet_hdr, NULL);
}
static void colo_compare_finalize(Object *obj)
@@ -4057,13 +4057,13 @@ Dump the network traffic on netdev @var{dev} to the file specified by
The file format is libpcap, so it can be analyzed with tools such as tcpdump
or Wireshark.
-@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid},
-outdev=@var{chardevid}
+@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid},outdev=@var{chardevid}[,vnet_hdr_support]
Colo-compare gets packet from primary_in@var{chardevid} and secondary_in@var{chardevid}, than compare primary packet with
secondary packet. If the packets are same, we will output primary
packet to outdev@var{chardevid}, else we will notify colo-frame
do checkpoint and send primary packet to outdev@var{chardevid}.
+if have the vnet_hdr_support flag, colo compare will send/recv packet with vnet_hdr_len.
we must use it with the help of filter-mirror and filter-redirector.
We add the vnet_hdr_support option for colo-compare, default is disable. If you use virtio-net-pci or other driver needs vnet_hdr, please enable it. You can use it for example: -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,vnet_hdr_support COLO-compare can get vnet header length from filter, Add vnet_hdr_len to struct packet and output packet with the vnet_hdr_len. Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> --- net/colo-compare.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++------- qemu-options.hx | 4 ++-- 2 files changed, 63 insertions(+), 11 deletions(-)