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Updating the directory entries in VfatWrite only, if the allocation size has changed.

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Added zeroing for files, if the write starts after the current end of the file.

svn path=/trunk/; revision=3035
This commit is contained in:
Hartmut Birr 2002-06-10 21:17:57 +00:00
parent 20a4914b89
commit f3e094f2f0
1 changed files with 19 additions and 12 deletions
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31
reactos/drivers/fs/vfat/rw.c
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@ -1,5 +1,5 @@
/* $Id: rw.c,v 1.41 2002/05/05 20:20:15 hbirr Exp $
/* $Id: rw.c,v 1.42 2002/06/10 21:17:57 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -786,15 +786,7 @@ VfatRead(PVFAT_IRP_CONTEXT IrpContext)
Status = STATUS_SUCCESS;
goto ByeBye;
}
#ifdef __VFAT_NT__
if (IrpContext->MinorFunction & IRP_MN_DPC)
{
DPRINT("IRP_MN_DPC is set\n");
IrpContext->MinorFunction &= ~IRP_MN_DPC;
Status = STATUS_PENDING;
goto ByeBye;
}
#endif
if (Fcb->Flags & FCB_IS_VOLUME)
{
Resource = &IrpContext->DeviceExt->DirResource;
@ -914,7 +906,6 @@ ByeBye:
{
IrpContext->FileObject->CurrentByteOffset.QuadPart =
ByteOffset.QuadPart + IrpContext->Irp->IoStatus.Information;
DPRINT("--> %d\n", IrpContext->Irp->IoStatus.Information);
}
IoCompleteRequest(IrpContext->Irp,
@ -931,8 +922,10 @@ NTSTATUS VfatWrite (PVFAT_IRP_CONTEXT IrpContext)
PVFATFCB Fcb;
PERESOURCE Resource = NULL;
LARGE_INTEGER ByteOffset;
LARGE_INTEGER OldFileSize;
NTSTATUS Status = STATUS_SUCCESS;
ULONG Length;
ULONG OldAllocationSize;
PVOID Buffer;
assert (IrpContext);
@ -1057,6 +1050,9 @@ NTSTATUS VfatWrite (PVFAT_IRP_CONTEXT IrpContext)
}
}
OldFileSize = Fcb->RFCB.FileSize;
OldAllocationSize = Fcb->RFCB.AllocationSize.u.LowPart;
if (!(Fcb->Flags & (FCB_IS_FAT|FCB_IS_VOLUME)) && !(IrpContext->Irp->Flags & IRP_PAGING_IO))
{
Status = vfatExtendSpace(IrpContext->DeviceExt, IrpContext->FileObject,
@ -1069,6 +1065,11 @@ NTSTATUS VfatWrite (PVFAT_IRP_CONTEXT IrpContext)
}
}
if (ByteOffset.QuadPart > OldFileSize.QuadPart)
{
CcZeroData(IrpContext->FileObject, &OldFileSize, &ByteOffset, TRUE);
}
if (!(IrpContext->Irp->Flags & (IRP_NOCACHE|IRP_PAGING_IO)) &&
!(Fcb->Flags & (FCB_IS_PAGE_FILE|FCB_IS_VOLUME)))
{
@ -1129,7 +1130,13 @@ NTSTATUS VfatWrite (PVFAT_IRP_CONTEXT IrpContext)
&Fcb->entry.UpdateTime);
Fcb->entry.AccessDate = Fcb->entry.UpdateDate;
// update dates/times and length
updEntry (IrpContext->DeviceExt, IrpContext->FileObject);
if (OldAllocationSize != Fcb->RFCB.AllocationSize.u.LowPart)
{
updEntry (IrpContext->DeviceExt, IrpContext->FileObject);
Fcb->Flags &= ~FCB_UPDATE_DIRENTRY;
}
else
Fcb->Flags |= FCB_UPDATE_DIRENTRY;
}
}