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Implemented CcSetFileSizes().

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svn path=/trunk/; revision=2275
This commit is contained in:
Hartmut Birr 2001-10-10 21:48:09 +00:00
parent 4fd4a97760
commit 4bda2fbdb1
1 changed files with 56 additions and 0 deletions
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reactos/ntoskrnl/cc/misc.c Normal file
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/* 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);
}