net: determine if packets can be sent before net queue deliver packets

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

2 files changed, 5 insertions, 11 deletions

diff --git a/net/queue.c b/net/queue.c
index 0afd783..e8030aa 100644
--- a/net/queue.c
+++ b/net/queue.c
@@ -176,8 +176,8 @@ ssize_t qemu_net_queue_send(NetQueue *queue,
 {
     ssize_t ret;
 
-    if (queue->delivering) {
-        return qemu_net_queue_append(queue, sender, flags, data, size, NULL);
+    if (queue->delivering || !qemu_can_send_packet(sender)) {
+        return qemu_net_queue_append(queue, sender, flags, data, size, sent_cb);
     }
 
     ret = qemu_net_queue_deliver(queue, sender, flags, data, size);
@@ -200,8 +200,9 @@ ssize_t qemu_net_queue_send_iov(NetQueue *queue,
 {
     ssize_t ret;
 
-    if (queue->delivering) {
-        return qemu_net_queue_append_iov(queue, sender, flags, iov, iovcnt, NULL);
+    if (queue->delivering || !qemu_can_send_packet(sender)) {
+        return qemu_net_queue_append_iov(queue, sender, flags,
+                                         iov, iovcnt, sent_cb);
     }
 
     ret = qemu_net_queue_deliver_iov(queue, sender, flags, iov, iovcnt);
diff --git a/net/slirp.c b/net/slirp.c
index 9d5ca79..08adb97 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -97,13 +97,6 @@ static void slirp_smb_cleanup(SlirpState *s);
 static inline void slirp_smb_cleanup(SlirpState *s) { }
 #endif
 
-int slirp_can_output(void *opaque)
-{
-    SlirpState *s = opaque;
-
-    return qemu_can_send_packet(&s->nc);
-}
-
 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 {
     SlirpState *s = opaque;