From ff2a5fed4da67907cc86162553d3689db3a22c06 Mon Sep 17 00:00:00 2001
From: Jeffrey Altman <jaltman@your-file-system.com>
Date: Wed, 17 Apr 2013 18:21:40 -0400
Subject: [PATCH] Windows: IOCTL_AFS_GET_DEBUG_TRACE

Pemrit the active Debug Flags and Trace Configuration to be
queried by administrators.

Change-Id: I0c798bd2eb8f2445c81a0b45c112bbaf72d15522
Reviewed-on: http://gerrit.openafs.org/9798
Reviewed-by: Peter Scott <pscott@kerneldrivers.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
---
 src/WINNT/afsrdr/common/AFSUserIoctl.h        |  2 ++
 src/WINNT/afsrdr/kernel/fs/AFSCommSupport.cpp | 27 +++++++++++++++++++
 src/WINNT/afsrdr/kernel/fs/AFSLogSupport.cpp  | 25 +++++++++++++++++
 .../afsrdr/kernel/fs/Include/AFSCommon.h      |  3 +++
 4 files changed, 57 insertions(+)

diff --git a/src/WINNT/afsrdr/common/AFSUserIoctl.h b/src/WINNT/afsrdr/common/AFSUserIoctl.h
index 8cf87c65e..938c32f79 100644
--- a/src/WINNT/afsrdr/common/AFSUserIoctl.h
+++ b/src/WINNT/afsrdr/common/AFSUserIoctl.h
@@ -95,4 +95,6 @@
 
 #define IOCTL_AFS_GET_REPARSE_POLICY            CTL_CODE( FILE_DEVICE_DISK_FILE_SYSTEM, 0x101D, METHOD_BUFFERED, FILE_ANY_ACCESS)
 
+#define IOCTL_AFS_GET_DEBUG_TRACE               CTL_CODE( FILE_DEVICE_DISK_FILE_SYSTEM, 0x101E, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
 #endif /* _AFS_USER_IOCTL_H */
diff --git a/src/WINNT/afsrdr/kernel/fs/AFSCommSupport.cpp b/src/WINNT/afsrdr/kernel/fs/AFSCommSupport.cpp
index 614004b93..b60ab7e60 100644
--- a/src/WINNT/afsrdr/kernel/fs/AFSCommSupport.cpp
+++ b/src/WINNT/afsrdr/kernel/fs/AFSCommSupport.cpp
@@ -435,9 +435,11 @@ AFSCheckIoctlPermissions( IN ULONG ControlCode)
             return STATUS_SUCCESS;
 
         case IOCTL_AFS_CONFIGURE_DEBUG_TRACE:
+	case IOCTL_AFS_GET_DEBUG_TRACE:
         case IOCTL_AFS_GET_TRACE_BUFFER:
         case IOCTL_AFS_FORCE_CRASH:
 
+
             //
             // Any admin can call these
             //
@@ -701,6 +703,31 @@ AFSProcessControlRequest( IN PIRP Irp)
                 break;
             }
 
+	    case IOCTL_AFS_GET_DEBUG_TRACE:
+	    {
+
+		AFSTraceConfigCB *pTraceInfo = (AFSTraceConfigCB *)Irp->AssociatedIrp.SystemBuffer;
+
+		if( pTraceInfo == NULL ||
+		    pIrpSp->Parameters.DeviceIoControl.OutputBufferLength < sizeof( AFSTraceConfigCB))
+		{
+
+		    ntStatus = STATUS_INVALID_PARAMETER;
+
+		    break;
+		}
+
+		ntStatus = AFSGetTraceConfig( pTraceInfo);
+
+		if ( NT_SUCCESS( ntStatus))
+		{
+
+		    Irp->IoStatus.Information = sizeof( AFSTraceConfigCB);
+		}
+
+		break;
+	    }
+
             case IOCTL_AFS_GET_TRACE_BUFFER:
             {
 
diff --git a/src/WINNT/afsrdr/kernel/fs/AFSLogSupport.cpp b/src/WINNT/afsrdr/kernel/fs/AFSLogSupport.cpp
index eb52f1867..779c090da 100644
--- a/src/WINNT/afsrdr/kernel/fs/AFSLogSupport.cpp
+++ b/src/WINNT/afsrdr/kernel/fs/AFSLogSupport.cpp
@@ -420,6 +420,31 @@ try_exit:
     return ntStatus;
 }
 
+NTSTATUS
+AFSGetTraceConfig( OUT AFSTraceConfigCB *TraceInfo)
+{
+    NTSTATUS ntStatus = STATUS_SUCCESS;
+
+    __Enter
+    {
+
+	AFSAcquireExcl( &AFSDbgLogLock,
+			TRUE);
+
+	TraceInfo->TraceLevel = AFSTraceLevel;
+
+	TraceInfo->TraceBufferLength = AFSDbgBufferLength;
+
+	TraceInfo->Subsystem = AFSTraceComponent;
+
+	TraceInfo->DebugFlags = AFSDebugFlags;
+
+	AFSReleaseResource( &AFSDbgLogLock);
+    }
+
+    return ntStatus;
+}
+
 NTSTATUS
 AFSGetTraceBuffer( IN ULONG TraceBufferLength,
                    OUT void *TraceBuffer,
diff --git a/src/WINNT/afsrdr/kernel/fs/Include/AFSCommon.h b/src/WINNT/afsrdr/kernel/fs/Include/AFSCommon.h
index c51a5f844..55ab75652 100644
--- a/src/WINNT/afsrdr/kernel/fs/Include/AFSCommon.h
+++ b/src/WINNT/afsrdr/kernel/fs/Include/AFSCommon.h
@@ -786,6 +786,9 @@ AFSTearDownDbgLog( void);
 NTSTATUS
 AFSConfigureTrace( IN AFSTraceConfigCB *TraceInfo);
 
+NTSTATUS
+AFSGetTraceConfig( OUT AFSTraceConfigCB *TraceInfo);
+
 NTSTATUS
 AFSGetTraceBuffer( IN ULONG TraceBufferLength,
                    OUT void *TraceBuffer,
-- 
2.39.5