Re: [Qemu-devel] [PATCH] tcm_vhost: Expose ABI version via VHOST_SCSI_GET_ABI_VERSION

[Michael S. Tsirkin]

On Thu, Jul 26, 2012 at 01:15:26PM -0700, Nicholas A. Bellinger wrote:
>  If there is a better way to handle ioctl compat I'd
> certainly like to hear about it.


You basically don't touch exiting commands, always add new ones.
For example if you want to simply stop some ioctl from working
for old userspace, the simplest way is to change ioctl number.


-- 
MST