[Qemu-devel] [PATCH V7 3/5] net: model specific announcing support

[Jason Wang <jasowang@redhat.com>]

This patch introduces a function pointer in NetClientInfo which is called during
self announcement. With this, each kind of card can announce the link with a
model specific way. The old method is still kept for cards that have not
implemented this or old guest. The first user would be virtio-net.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 include/net/net.h |    2 ++
 savevm.c          |    8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/net/net.h b/include/net/net.h
index cb049a1..49031b4 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -44,6 +44,7 @@ typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
 typedef void (NetCleanup) (NetClientState *);
 typedef void (LinkStatusChanged)(NetClientState *);
 typedef void (NetClientDestructor)(NetClientState *);
+typedef int (NetAnnounce)(NetClientState *);
 
 typedef struct NetClientInfo {
     NetClientOptionsKind type;
@@ -55,6 +56,7 @@ typedef struct NetClientInfo {
     NetCleanup *cleanup;
     LinkStatusChanged *link_status_changed;
     NetPoll *poll;
+    NetAnnounce *announce;
 } NetClientInfo;
 
 struct NetClientState {
diff --git a/savevm.c b/savevm.c
index a8a53ef..fd69e32 100644
--- a/savevm.c
+++ b/savevm.c
@@ -76,12 +76,16 @@ static int announce_self_create(uint8_t *buf,
 
 static void qemu_announce_self_iter(NICState *nic, void *opaque)
 {
+    NetClientState *nc = qemu_get_queue(nic);
+    NetAnnounce *announce = nc->info->announce;
     uint8_t buf[60];
     int len;
 
-    len = announce_self_create(buf, nic->conf->macaddr.a);
+    if (!announce || announce(nc)) {
+        len = announce_self_create(buf, nic->conf->macaddr.a);
 
-    qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
+        qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
+    }
 }
 
 
-- 
1.7.1