[PATCH v3] virtio_blk: add VIRTIO_BLK_F_LIFETIME feature support

[Chaitanya Kulkarni]

On 12/11/22 01:49, Alvaro Karsz wrote:
>> Alvaro could you pls explain the use-case? Christoph has doubts that
>> it's useful. Do you have a device implementing this?
> 
> Our HW exposes virtio devices, virtio block included.
> The block device backend can be a eMMC/uSD card.
> 
> The HW can report health values (power, temp, current, voltage) and I
> thought that it would be nice to be able to report lifetime values as
> well.

Why not use block layer passthru interface to fetch this instead of
adding non-generic IOCTL ?

-ck