[ovs-dev] [PATCH 1/9 v3] Datapath.h: Add data structure to hold the dump state.

Ankur Sharma ankursharma at vmware.com
Fri Aug 29 19:03:38 UTC 2014


Signed-off-by: Nithin Raju <nithin at vmware.com>
Signed-off-by: Ankur Sharma <ankursharma at vmware.com>
Acked-by: Ankur Sharma <ankursharma at vmware.com>
---
Please attribute this to Nithin Raju <nithin at vmware.com>
---
 datapath-windows/ovsext/Datapath.h | 53 +++++++++++++++++++++++++++++++-------
 1 file changed, 44 insertions(+), 9 deletions(-)

diff --git a/datapath-windows/ovsext/Datapath.h b/datapath-windows/ovsext/Datapath.h
index bfbbd71..facd875 100644
--- a/datapath-windows/ovsext/Datapath.h
+++ b/datapath-windows/ovsext/Datapath.h
@@ -28,6 +28,16 @@
 #ifndef __DATAPATH_H_
 #define __DATAPATH_H_ 1
 
+/*
+ * Structure of any message passed between userspace and kernel.
+ */
+typedef struct _OVS_MESSAGE {
+    NL_MSG_HDR nlMsg;
+    GENL_MSG_HDR genlMsg;
+    struct ovs_header ovsHdr;
+    /* Variable length nl_attrs follow. */
+} OVS_MESSAGE, *POVS_MESSAGE;
+
 typedef struct _OVS_DEVICE_EXTENSION {
     INT numberOpenInstance;
     INT pidCount;
@@ -57,6 +67,12 @@ typedef struct _OVS_OPEN_INSTANCE {
      * restriction might go away as the userspace code gets implemented.
      */
     INT inUse;
+
+    struct {
+        POVS_MESSAGE ovsMsg;    /* OVS message passed during dump start. */
+        UINT32 index[8];        /* markers to continue dump from. One or more
+                                 * of them may be used. */
+    } dumpState;                /* data to support dump commands. */
 } OVS_OPEN_INSTANCE, *POVS_OPEN_INSTANCE;
 
 NDIS_STATUS OvsCreateDeviceObject(NDIS_HANDLE ovsExtDriverHandle);
@@ -67,16 +83,35 @@ POVS_OPEN_INSTANCE OvsGetOpenInstance(PFILE_OBJECT fileObject,
 
 NTSTATUS OvsCompleteIrpRequest(PIRP irp, ULONG_PTR infoPtr, NTSTATUS status);
 
-/*
- * Structure of any message passed between userspace and kernel.
- */
-typedef struct _OVS_MESSAGE {
-    NL_MSG_HDR nlMsg;
-    GENL_MSG_HDR genlMsg;
-    struct ovs_header ovsHdr;
-    /* Variable length nl_attrs follow. */
-} OVS_MESSAGE, *POVS_MESSAGE;
+static __inline NTSTATUS
+InitUserDumpState(POVS_OPEN_INSTANCE instance,
+                  POVS_MESSAGE ovsMsg)
+{
+    /* Clear the dumpState from a previous dump sequence. */
+    ASSERT(instance->dumpState.ovsMsg == NULL);
+    ASSERT(ovsMsg);
+
+    instance->dumpState.ovsMsg = (POVS_MESSAGE) OvsAllocateMemory(
+        sizeof *instance->dumpState.ovsMsg);
+    if (instance->dumpState.ovsMsg == NULL) {
+        return STATUS_NO_MEMORY;
+    }
+    RtlCopyMemory(instance->dumpState.ovsMsg, ovsMsg,
+                  sizeof *instance->dumpState.ovsMsg);
+    RtlZeroMemory(instance->dumpState.index,
+                  sizeof instance->dumpState.index);
+
+    return STATUS_SUCCESS;
+}
 
+static __inline VOID
+FreeUserDumpState(POVS_OPEN_INSTANCE instance)
+{
+    if (instance->dumpState.ovsMsg != NULL) {
+        OvsFreeMemory(instance->dumpState.ovsMsg);
+        RtlZeroMemory(&instance->dumpState, sizeof instance->dumpState);
+    }
+}
 #endif /* __DATAPATH_H_ */
 
 #endif /* OVS_USE_NL_INTERFACE */
-- 
1.8.3.2




More information about the dev mailing list