[Cfapi: AckDelete] Got "Invalid File Handle" when deleting cloud file on Win10

Question

When working with the Cloud Filter API, user delete file via Explorer and our app got delete callback and execute QCF_OPERATION_TYPE_ACK_DELETE successfully. But Explorer show "Invalid File Handle" and file cannot be deleted.

We found that if PC install third party antivirus and delete file will get "Invalid File Handle". If tun on windows defender "Periodic scanning", file can be deleted successfully.

Please help to provide us suggestions (what registers or settings... app have to set up before delete cloud file??)
Thanks

Answer 1

Hi RitaHan,
official sample Cloud Mirror does not register delete callback "CF_CALLBACK_TYPE_NOTIFY_DELETE"
CF_CALLBACK_REGISTRATION FakeCloudProvider::s_MirrorCallbackTable[] =
{
{ CF_CALLBACK_TYPE_FETCH_DATA, FakeCloudProvider::OnFetchData },
{ CF_CALLBACK_TYPE_CANCEL_FETCH_DATA, FakeCloudProvider::OnCancelFetchData },
CF_CALLBACK_REGISTRATION_END
};

Our app registered as below:
CF_CALLBACK_REGISTRATION FakeCloudProvider::s_MirrorCallbackTable[] =
{
{ CF_CALLBACK_TYPE_FETCH_DATA, FakeCloudProvider::OnFetchData },
{ CF_CALLBACK_TYPE_VALIDATE_DATA, FakeCloudProvider::OnValidateData},
{ CF_CALLBACK_TYPE_CANCEL_FETCH_DATA, FakeCloudProvider::OnCancelFetchData },
{ CF_CALLBACK_TYPE_FETCH_PLACEHOLDERS, FakeCloudProvider::OnFetchPlaceholders},
{ CF_CALLBACK_TYPE_NOTIFY_FILE_OPEN_COMPLETION, FakeCloudProvider::OnFileOpenCompletion},
{ CF_CALLBACK_TYPE_NOTIFY_FILE_CLOSE_COMPLETION, FakeCloudProvider::OnFileCloseCompletion},
{ CF_CALLBACK_TYPE_NOTIFY_DEHYDRATE, FakeCloudProvider::OnDehydrate},
{ CF_CALLBACK_TYPE_NOTIFY_DEHYDRATE_COMPLETION, FakeCloudProvider::OnDehydrateCompletion},
{ CF_CALLBACK_TYPE_NOTIFY_DELETE, FakeCloudProvider::OnDelete},
{ CF_CALLBACK_TYPE_NOTIFY_DELETE_COMPLETION, FakeCloudProvider::OnDeleteCompletion},
{ CF_CALLBACK_TYPE_NOTIFY_RENAME, FakeCloudProvider::OnRename},
{ CF_CALLBACK_TYPE_NOTIFY_RENAME_COMPLETION, FakeCloudProvider::OnRenameCompletion},
CF_CALLBACK_REGISTRATION_END
};

if remove "CF_CALLBACK_TYPE_NOTIFY_DELETE" and "CF_CALLBACK_TYPE_NOTIFY_DELETE_COMPLETION", file can be deleted successfully.
But why these two callback implemented result in delete cloud file failed??

Answer 2

Hi RitaHan,
void OnDelete(const QCF_CALLBACK_INFO * callbackInfo, const QCF_CALLBACK_PARAMETERS * callbackParameters)
{
HRESULT hr = E_FAIL;

CF_OPERATION_INFO opInfo = { 0 };
CF_OPERATION_PARAMETERS opParams = { 0 };

opInfo.StructSize = sizeof(opInfo);
opInfo.Type = CF_OPERATION_TYPE_ACK_DELETE;
opInfo.ConnectionKey = callbackInfo->ConnectionKey;
opInfo.TransferKey = callbackInfo->TransferKey;

opParams.ParamSize = CF_SIZE_OF_OP_PARAM(AckDelete);
opParams.AckDelete.CompletionStatus = NTSTATUS_FROM_WIN32(ERROR_SUCCESS);
opParams.AckDelete.Flags = CF_OPERATION_ACK_DELETE_FLAG_NONE;

hr = CfExecute(&opInfo, &opParams);

}

void OnDeleteCompletion(const QCF_CALLBACK_INFO * callbackInfo, const QCF_CALLBACK_PARAMETERS * callbackParameters)
{

}