On 13/02/19 07:33, Stefan Hajnoczi wrote:
> +Notifications are different from normal requests because they only contain
> +device writable fields. The driver sends notification replies on one of the
> +request queues. The format of notification requests is as follows:
> +
> +\begin{lstlisting}
> +struct virtio_fs_notification_req {
> + // Device-writable part
> + struct fuse_out_header out;
> + u8 dataout[];
> +};
> +\end{lstlisting}
> +
> +\field{out} is the completion header common to all types of FUSE requests. The
> +\field{out.unique} field is 0 and the \field{out.error} field contains a
> +FUSE_NOTIFY_* code.
> +
> +\field{dataout} consists of request-specific data, if any. This is identical
> +to the data written to the /dev/fuse device by a FUSE daemon.
> +
What happens if notifications are lost because no request was there?
virtio-scsi has a flag for that, would it make sense to add it here too?
Paolo
