[win-pv-devel] [PATCH 3/3] Log outstanding packet count when miniport is disabled

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
 src/xennet/adapter.c  |  4 ++++
 src/xennet/receiver.c | 24 ++++++++++++++++++++++++
 src/xennet/receiver.h | 10 ++++++++++
 3 files changed, 38 insertions(+)

diff --git a/src/xennet/adapter.c b/src/xennet/adapter.c
index 9a062e1..637ac72 100644
--- a/src/xennet/adapter.c
+++ b/src/xennet/adapter.c
@@ -1932,6 +1932,8 @@ AdapterEnable(
     if (!NT_SUCCESS(status))
         goto fail4;
 
+    ReceiverEnable(Adapter->Receiver);
+
     AdapterMediaStateChange(Adapter);
 
     Adapter->Enabled = TRUE;
@@ -1959,6 +1961,8 @@ AdapterDisable(
     ASSERT(Adapter->Enabled);
     Adapter->Enabled = FALSE;
 
+    ReceiverDisable(Adapter->Receiver);
+
     XENVIF_VIF(Disable,
                &Adapter->VifInterface);
 
diff --git a/src/xennet/receiver.c b/src/xennet/receiver.c
index 36a153b..043db53 100644
--- a/src/xennet/receiver.c
+++ b/src/xennet/receiver.c
@@ -378,11 +378,15 @@ __ReceiverPushPackets(
     KeReleaseSpinLockFromDpcLevel(&Queue->Lock);
 
     Indicated = InterlockedAdd(&Receiver->Indicated, Count);
+
+    KeMemoryBarrier();
+
     Returned = Receiver->Returned;
 
     Flags = NDIS_RECEIVE_FLAGS_DISPATCH_LEVEL |
             NDIS_RECEIVE_FLAGS_PERFECT_FILTERED;
 
+    ASSERT3S(Indicated - Returned, >=, 0);
     if (Indicated - Returned > IN_NDIS_MAX)
         Flags |= NDIS_RECEIVE_FLAGS_RESOURCES;
 
@@ -571,3 +575,23 @@ ReceiverOffloadOptions(
 {
     return &Receiver->OffloadOptions;
 }
+
+VOID
+ReceiverEnable(
+    IN  PXENNET_RECEIVER    Receiver
+    )
+{
+    UNREFERENCED_PARAMETER(Receiver);
+
+    Info("<====>\n");
+}
+
+VOID
+ReceiverDisable(
+    IN  PXENNET_RECEIVER    Receiver
+    )
+{
+    Info("<====> (Indicated = %u Returned = %u)\n",
+         Receiver->Indicated,
+         Receiver->Returned);
+}
diff --git a/src/xennet/receiver.h b/src/xennet/receiver.h
index 5b59431..5fc9e66 100644
--- a/src/xennet/receiver.h
+++ b/src/xennet/receiver.h
@@ -76,4 +76,14 @@ ReceiverOffloadOptions(
     IN  PXENNET_RECEIVER    Receiver
     );
 
+extern VOID
+ReceiverEnable(
+    IN  PXENNET_RECEIVER    Receiver
+    );
+
+extern VOID
+ReceiverDisable(
+    IN  PXENNET_RECEIVER    Receiver
+    );
+
 #endif // _XENNET_RECEIVER_H_
-- 
2.5.3


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