From 05cd85be9b0736c8a78df8c2bc3681e8ffcda6a4 Mon Sep 17 00:00:00 2001
From: Dibyamartanda Samanta <dibyaxp@noreply.codingworkshop.git>
Date: Fri, 21 Jun 2024 17:49:04 +0200
Subject: [PATCH] [NTOSKRNL:CC] Pin Hadler Initial Commit

* Implemented  CcMapDataCommon
Rest of the API will be implemented Soon.
---
 NTOSKRNL/CC/ccpinsupport.cpp | 88 ++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 NTOSKRNL/CC/ccpinsupport.cpp

diff --git a/NTOSKRNL/CC/ccpinsupport.cpp b/NTOSKRNL/CC/ccpinsupport.cpp
new file mode 100644
index 0000000..4d02ab3
--- /dev/null
+++ b/NTOSKRNL/CC/ccpinsupport.cpp
@@ -0,0 +1,88 @@
+/*
+ * PROJECT: Alcyone System Kernel
+ * LICENSE: BSD Clause 3
+ * PURPOSE: Cache Controller:: Lazy Writer
+ * NT KERNEL: 5.11.9360
+ * COPYRIGHT:  2023-2029 Dibymartanda Samanta <>
+ */ 
+
+#include <ntoskrnl.h>
+#define NTDEBUG
+#include <debug.h>
+#include "ccinternal.hpp"
+
+
+extern "C"
+
+
+/*Internal Function*/
+
+BOOLEAN
+NTAPI
+CcPinFileData(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PLARGE_INTEGER FileOffset,
+    _In_ ULONG Length,
+    _In_ BOOLEAN IsNoWrite,
+    _In_ BOOLEAN Flags,
+    _In_ ULONG PinFlags,
+    _Out_ PCC_BCB* Bcb,
+    _Out_ PVOID* Buffer,
+    _Out_ LARGE_INTEGER* BeyondLastByte)
+{
+     // Unimplemented
+}
+
+BOOLEAN 
+NTAPI
+CcMapDataCommon(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PLARGE_INTEGER FileOffset,
+    _In_ ULONG Length,
+    _In_ ULONG Flags,
+    _Out_ PVOID *Bcb,
+    _Out_ PVOID *Buffer
+)
+  {
+  if (Flags & FILE_PIN_SEQUENTIAL_READ)
+        InterlockedIncrement(&CcSequentialReadCount);
+    else
+        InterlockedIncrement(&CcRandomReadCount);
+
+    KeGetCurrentThread()->WaitIrql = PASSIVE_LEVEL;
+
+    if (Flags & FILE_PIN_SEQUENTIAL_READ)
+    {
+        *Buffer = CcGetVirtualAddress(SharedMap, *FileOffset, (PVACB *)&Bcb, &ReceivedLength);
+        return TRUE;
+    }
+    else
+    {
+        LARGE_INTEGER BeyondLastByte;
+        if (CcPinFileData(FileObject, FileOffset, Length, TRUE, 0, Flags, Bcb, Buffer, &BeyondLastByte))
+        {
+            return TRUE;
+        }
+        else
+        {
+            InterlockedIncrement(&CCFailedPinReadCount);
+            return FALSE;
+        }
+    }
+
+   }
+}
+
+VOID
+NTAPI
+CcUnpinFileDataEx(
+    _In_ PCC_BCB Bcb,
+    _In_ BOOLEAN WriteStatus,
+    _In_ ULONG Type)
+{
+    // Unimplementd
+}
+
+
+
+