BOOLEAN
Ext2FastIoWrite (
IN PFILE_OBJECT FileObject,
IN PLARGE_INTEGER FileOffset,
IN ULONG Length,
IN BOOLEAN Wait,
IN ULONG LockKey,
OUT PVOID Buffer,
OUT PIO_STATUS_BLOCK IoStatus,
IN PDEVICE_OBJECT DeviceObject)
{
PEXT2_FCB Fcb = NULL;
BOOLEAN Status = FALSE;
BOOLEAN Locked = FALSE;
Fcb = (PEXT2_FCB) FileObject->FsContext;
if (Fcb == NULL)
return FALSE;
__try {
FsRtlEnterFileSystem();
ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
(Fcb->Identifier.Size == sizeof(EXT2_FCB)));
if (IsFlagOn(Fcb->Vcb->Flags, VCB_READ_ONLY)) {
__leave;
}
ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE);
Locked = TRUE;
if (IsEndOfFile(*FileOffset) || ((LONGLONG)(Fcb->Inode->i_size) <
(FileOffset->QuadPart + Length)) ) {
} else {
ExReleaseResourceLite(&Fcb->MainResource);
Locked = FALSE;
Status = FsRtlCopyWrite(FileObject, FileOffset, Length, Wait,
LockKey, Buffer, IoStatus, DeviceObject);
}
} __finally {
if (Locked) {
ExReleaseResourceLite(&Fcb->MainResource);
}
FsRtlExitFileSystem();
}
DEBUG(DL_IO, ("Ext2FastIoWrite: %wZ Offset: %I64xh Length: %xh Key: %xh Status=%d\n",
&Fcb->Mcb->ShortName, FileOffset->QuadPart, Length, LockKey, Status));
return Status;
}
BOOLEAN
Ext2FastIoWrite (
IN PFILE_OBJECT FileObject,
IN PLARGE_INTEGER FileOffset,
IN ULONG Length,
IN BOOLEAN Wait,
IN ULONG LockKey,
OUT PVOID Buffer,
OUT PIO_STATUS_BLOCK IoStatus,
IN PDEVICE_OBJECT DeviceObject)
{
PEXT2_FCB Fcb = NULL;
BOOLEAN Status = FALSE;
BOOLEAN Locked = FALSE;
Fcb = (PEXT2_FCB) FileObject->FsContext;
if (Fcb == NULL)
return FALSE;
__try {
FsRtlEnterFileSystem();
ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
(Fcb->Identifier.Size == sizeof(EXT2_FCB)));
if (IsVcbReadOnly(Fcb->Vcb)) {
__leave;
}
if (!ExAcquireResourceSharedLite(Fcb->Header.Resource, Wait)) {
__leave;
}
Locked = TRUE;
if (IsWritingToEof(*FileOffset) ||
Fcb->Header.ValidDataLength.QuadPart < FileOffset->QuadPart + Length ||
Fcb->Header.FileSize.QuadPart < FileOffset->QuadPart + Length ) {
Status = FALSE;
__leave;
}
if (Locked) {
ExReleaseResourceLite(Fcb->Header.Resource);
Locked = FALSE;
}
Status = FsRtlCopyWrite(FileObject, FileOffset, Length, Wait,
LockKey, Buffer, IoStatus, DeviceObject);
if (Status) {
if (IoStatus)
Length = (ULONG)IoStatus->Information;
}
} __finally {
if (Locked) {
ExReleaseResourceLite(Fcb->Header.Resource);
}
FsRtlExitFileSystem();
}
DEBUG(DL_IO, ("Ext2FastIoWrite: %wZ Offset: %I64xh Length: %xh Key: %xh Status=%d\n",
&Fcb->Mcb->ShortName, FileOffset->QuadPart, Length, LockKey, Status));
return Status;
}
