From 4bda2fbdb14072f0a5f4ac30ff82631b0c1e8e85 Mon Sep 17 00:00:00 2001
From: Hartmut Birr <osexpert@googlemail.com>
Date: Wed, 10 Oct 2001 21:48:09 +0000
Subject: [PATCH] Implemented CcSetFileSizes().

svn path=/trunk/; revision=2275
---
 reactos/ntoskrnl/cc/misc.c | 56 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 reactos/ntoskrnl/cc/misc.c

diff --git a/reactos/ntoskrnl/cc/misc.c b/reactos/ntoskrnl/cc/misc.c
new file mode 100644
index 00000000000..43df08b9317
--- /dev/null
+++ b/reactos/ntoskrnl/cc/misc.c
@@ -0,0 +1,56 @@
+/* INCLUDES ******************************************************************/
+
+#include <ddk/ntddk.h>
+#include <ddk/ntifs.h>
+#include <internal/mm.h>
+#include <internal/cc.h>
+#include <internal/pool.h>
+#include <internal/io.h>
+#include <ntos/minmax.h>
+
+#define NDEBUG
+#include <internal/debug.h>
+
+/* GLOBALS *******************************************************************/
+
+/* FUNCTIONS *****************************************************************/
+
+VOID STDCALL
+CcSetFileSizes (
+   IN PFILE_OBJECT FileObject,
+   IN PCC_FILE_SIZES FileSizes)
+{
+  KIRQL oldirql;
+  PBCB Bcb;
+  PLIST_ENTRY current_entry;
+  PCACHE_SEGMENT current;
+
+  DPRINT("CcSetFileSizes(FileObject %x, FileSizes %x)\n", FileObject, FileSizes);
+  DPRINT("AllocationSize %d, FileSize %d, ValidDataLength %d\n",
+         (ULONG)FileSizes->AllocationSize.QuadPart,
+         (ULONG)FileSizes->FileSize.QuadPart,
+         (ULONG)FileSizes->ValidDataLength.QuadPart);
+
+  Bcb = ((REACTOS_COMMON_FCB_HEADER*)FileObject->FsContext)->Bcb;
+
+  KeAcquireSpinLock(&Bcb->BcbLock, &oldirql);
+
+  if (FileSizes->AllocationSize.QuadPart < Bcb->AllocationSize.QuadPart)
+  {
+    current_entry = Bcb->CacheSegmentListHead.Flink;
+    while (current_entry != &Bcb->CacheSegmentListHead)
+    {
+      current = CONTAINING_RECORD(current_entry, CACHE_SEGMENT, BcbListEntry);
+      current_entry = current_entry->Flink;
+      if (current->FileOffset > FileSizes->AllocationSize.QuadPart)
+      {
+        current_entry = current_entry->Flink;
+        CcRosFreeCacheSegment(Bcb, current);
+      }
+    }
+  }
+  Bcb->AllocationSize = FileSizes->AllocationSize;
+  Bcb->FileSize = FileSizes->FileSize;
+  KeReleaseSpinLock(&Bcb->BcbLock, oldirql);
+}
+