[PATCH] Add a parameter for NVME_IOCTL_ID to get Namespaces ID

[Christoph Hellwig]

On Mon, May 22, 2017 at 03:51:43PM +0800, Zouming (IT) wrote:
> Hi,Christoph
> 
>   Thank you for your detailed response to the fail scenario.
>   Using the ioctl method to get namespace id is easier than using the sysfs file method when only the nvme device's handle is available.
>   So I want to add a new ioctl name called NVME_IOCTL_NS_ID,Is that OK?

I'm still not sold too much on adding a new ioctl, but IFF we do it that
would be the way.