Re: [RFC PATCH 05/30] qemu: block: Extract formatting of props for 'file' backend

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Am 20.04.2018 um 09:56 hat Peter Krempa geschrieben:
> Is there a special need to use 'host_cdrom' explicitly if the CDROM
> drive is used? That would complicate things since we don't know when
> that will happen.

You don't get the full CD-ROM passthrough functionality with
host_device. Specifically, if you eject the virtual drive, the physical
drive will only be ejected with host_cdrom, and the same is true for
lock_medium.

I think we may also make an attempt at detecting physical media change
ocassionally with host_cdrom, but I doubt that this is working reliably
anyway (the driver function is .bdrv_is_inserted, so it would be polling
rather than processing an event; and I'm not sure when it's called).

Kevin

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