Re: [PATCH v2] virtio_blk: add VIRTIO_BLK_F_LIFETIME feature support

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> And now is this generic enough to disconnect from virtio and
> make it a generic blk thing?

It could be generic enough if we drop the virtio structs and pass
single fields as elements.
The point is, we can easily make it generic enough, do we want to?

At the moment, there is at least 1 existing device-specific ioctl to
retrieve lifetime info (that I'm aware of),
MMC_IOC_CMD for a MMC device with MMC_SEND_EXT_CSD opcode.
So we will have duplication for MMC devices (for some of the lifetime fields).

Do you want it to be blk generic?

Alvaro
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