[ros-diffs] [hbirr] 19691: Lock the MainResource from fcb, if we are trying to write back a modified cache segment.

Lock the MainResource from fcb, if we are trying to write back a
modified cache segment. 
Usually we have to call the callback function from FSD.
Modified: trunk/reactos/ntoskrnl/cc/view.c
  _____

Modified: trunk/reactos/ntoskrnl/cc/view.c
--- trunk/reactos/ntoskrnl/cc/view.c	2005-11-27 15:53:46 UTC (rev
19690)
+++ trunk/reactos/ntoskrnl/cc/view.c	2005-11-27 15:59:32 UTC (rev
19691)
@@ -244,21 +244,34 @@

current = CONTAINING_RECORD(current_entry, CACHE_SEGMENT,
    			  DirtySegmentListEntry);
       current_entry = current_entry->Flink;
+    
+//      Locked =
current->Bcb->Callbacks.AcquireForLazyWrite(current->Bcb->Context,
FALSE);
+      Locked =
ExTryToAcquireResourceExclusiveLite(((FSRTL_COMMON_FCB_HEADER*)(current-
> Bcb->FileObject->FsContext))->Resource);

+      if (!Locked)
+        {
+          continue;
+        }
       Locked = CcTryToAcquireBrokenMutex(&current->Lock);
       if (!Locked)
    {
+//
current->Bcb->Callbacks.ReleaseFromLazyWrite(current->Bcb->Context);
+
ExReleaseResourceLite(((FSRTL_COMMON_FCB_HEADER*)(current->Bcb->FileObje
ct->FsContext))->Resource);
      continue;
    }
       ASSERT(current->Dirty);
       if (current->ReferenceCount > 1)
    {

ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&current->Lock);
+//
current->Bcb->Callbacks.ReleaseFromLazyWrite(current->Bcb->Context);
+
ExReleaseResourceLite(((FSRTL_COMMON_FCB_HEADER*)(current->Bcb->FileObje
ct->FsContext))->Resource);
      continue;
    }
       ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&ViewLock);
       PagesPerSegment = current->Bcb->CacheSegmentSize / PAGE_SIZE;
       Status = CcRosFlushCacheSegment(current);
       ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&current->Lock);
+//
current->Bcb->Callbacks.ReleaseFromLazyWrite(current->Bcb->Context);
+
ExReleaseResourceLite(((FSRTL_COMMON_FCB_HEADER*)(current->Bcb->FileObje
ct->FsContext))->Resource);
       if (!NT_SUCCESS(Status) &&  (Status != STATUS_END_OF_FILE))
       {
     DPRINT1("CC: Failed to flush cache segment.\n");
@@ -443,7 +456,7 @@
       if (current->FileOffset <= FileOffset &&
      (current->FileOffset + Bcb->CacheSegmentSize) > FileOffset)
    {
-      CcRosCacheSegmentIncRefCount(current);
+          CcRosCacheSegmentIncRefCount(current);
      KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);

ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&current->Lock);
      return(current);