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- Check the returned status after calls to NextCluster/OffsetToCluster

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to detect a full disk.
- Call NextCluster with the correct parameters (FirstCluster/NextCluster).
- If the size for a file would be reduced, free first the cache segments
  and as second the clusters within the fat.

svn path=/trunk/; revision=4077
This commit is contained in:
Hartmut Birr 2003-01-28 16:48:03 +00:00
parent 9cac22fb79
commit 3c193e4b74
1 changed files with 47 additions and 33 deletions
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80
reactos/drivers/fs/vfat/finfo.c
View file

@ -1,4 +1,4 @@
/* $Id: finfo.c,v 1.25 2003/01/19 01:06:09 gvg Exp $
/* $Id: finfo.c,v 1.26 2003/01/28 16:48:03 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -385,6 +385,29 @@ VfatGetAllInformation(PFILE_OBJECT FileObject,
return STATUS_SUCCESS;
}
VOID UpdateFileSize(PFILE_OBJECT FileObject, PVFATFCB Fcb, ULONG Size, ULONG ClusterSize)
{
if (Size > 0)
{
Fcb->RFCB.AllocationSize.QuadPart = ROUND_UP(Size, ClusterSize);
}
else
{
Fcb->RFCB.AllocationSize.QuadPart = 0LL;
}
if (!vfatFCBIsDirectory(Fcb))
{
Fcb->entry.FileSize = Size;
}
Fcb->RFCB.FileSize.QuadPart = Size;
Fcb->RFCB.ValidDataLength.QuadPart = Size;
if (FileObject->SectionObjectPointers->SharedCacheMap != NULL)
{
CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&Fcb->RFCB.AllocationSize);
}
}
NTSTATUS
VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
PVFATFCB Fcb,
@ -421,7 +444,7 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &FirstCluster, TRUE);
if (!NT_SUCCESS(Status))
{
DPRINT1("NextCluster failed.\n");
DPRINT1("NextCluster failed. Status = %x\n", Status);
return Status;
}
if (FirstCluster == 0xffffffff)
@ -431,13 +454,14 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
Status = OffsetToCluster(DeviceExt, Fcb, FirstCluster,
ROUND_DOWN(NewSize - 1, ClusterSize),
&NCluster, TRUE);
if (NCluster == 0xffffffff)
if (NCluster == 0xffffffff || !NT_SUCCESS(Status))
{
/* disk is full */
NCluster = Cluster = FirstCluster;
while (Cluster != 0xffffffff)
Status = STATUS_SUCCESS;
while (NT_SUCCESS(Status) && Cluster != 0xffffffff && Cluster > 1)
{
NextCluster (DeviceExt, Fcb, Cluster, &NCluster, FALSE);
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &NCluster, FALSE);
WriteCluster (DeviceExt, Cluster, 0);
Cluster = NCluster;
}
@ -451,29 +475,32 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
Status = OffsetToCluster(DeviceExt, Fcb, FirstCluster,
Fcb->RFCB.AllocationSize.u.LowPart - ClusterSize,
&Cluster, FALSE);
/* FIXME: Check status */
/* Cluster points now to the last cluster within the chain */
Status = OffsetToCluster(DeviceExt, Fcb, FirstCluster,
ROUND_DOWN(NewSize - 1, ClusterSize),
&NCluster, TRUE);
if (NCluster == 0xffffffff)
if (NCluster == 0xffffffff || !NT_SUCCESS(Status))
{
/* disk is full */
NCluster = Cluster;
NextCluster (DeviceExt, Fcb, Cluster, &NCluster, FALSE);
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &NCluster, FALSE);
WriteCluster(DeviceExt, Cluster, 0xffffffff);
Cluster = NCluster;
while (Cluster != 0xffffffff)
while (NT_SUCCESS(Status) && Cluster != 0xffffffff && Cluster > 1)
{
NextCluster (DeviceExt, Fcb, Cluster, &NCluster, FALSE);
WriteCluster (DeviceExt, Cluster, 0);
Cluster = NCluster;
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &NCluster, FALSE);
WriteCluster (DeviceExt, Cluster, 0);
Cluster = NCluster;
}
return STATUS_DISK_FULL;
}
}
UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize);
}
else if (NewSize + ClusterSize <= Fcb->RFCB.AllocationSize.u.LowPart)
{
UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize);
if (NewSize > 0)
{
Status = OffsetToCluster(DeviceExt, Fcb, Cluster,
@ -481,41 +508,28 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
&Cluster, FALSE);
NCluster = Cluster;
Status = NextCluster (DeviceExt, Fcb, Cluster, &NCluster, FALSE);
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &NCluster, FALSE);
WriteCluster(DeviceExt, Cluster, 0xffffffff);
Cluster = NCluster;
}
else
{
Cluster = FirstCluster;
Fcb->entry.FirstCluster = 0;
Fcb->entry.FirstClusterHigh = 0;
NCluster = Cluster = FirstCluster;
Status = STATUS_SUCCESS;
}
while (0xffffffff != Cluster && 0 != Cluster)
while (NT_SUCCESS(Status) && 0xffffffff != Cluster && Cluster > 1)
{
NextCluster (DeviceExt, Fcb, Cluster, &NCluster, FALSE);
Status = NextCluster (DeviceExt, Fcb, FirstCluster, &NCluster, FALSE);
WriteCluster (DeviceExt, Cluster, 0);
Cluster = NCluster;
}
}
if (!vfatFCBIsDirectory(Fcb))
{
Fcb->entry.FileSize = NewSize;
}
if (NewSize > 0)
{
Fcb->RFCB.AllocationSize.QuadPart = ROUND_UP(NewSize - 1, ClusterSize);
}
else
{
Fcb->RFCB.AllocationSize.QuadPart = 0LL;
Fcb->entry.FirstCluster = 0;
Fcb->entry.FirstClusterHigh = 0;
}
Fcb->RFCB.FileSize.QuadPart = NewSize;
Fcb->RFCB.ValidDataLength.QuadPart = NewSize;
if (FileObject->SectionObjectPointers->SharedCacheMap != NULL)
{
CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&Fcb->RFCB.AllocationSize);
UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize);
}
/* Update the on-disk directory entry */
VfatUpdateEntry(DeviceExt, FileObject);