Re: [Qemu-devel] [PATCH v5 19/38] block: Fail requests to empty BlockBackend

[Kevin Wolf]

Am 18.09.2015 um 17:22 hat Max Reitz geschrieben:
> If there is no BlockDriverState in a BlockBackend or if the tray of the
> guest device is open, fail all requests (where that is possible) with
> -ENOMEDIUM.
> 
> The reason the status of the guest device is taken into account is
> because once the guest device's tray is opened, any request on the same
> BlockBackend as the guest uses should fail. If the BDS tree is supposed
> to be usable even after ejecting it from the guest, a different
> BlockBackend must be used.
> 
> Signed-off-by: Max Reitz <address@hidden>
> Reviewed-by: Eric Blake <address@hidden>

Do we want to include blk_drain() to make it a no-op instead of
crashing?

Also, we're now introducing BlockAIOCBs with a NULL bs with your use of
abort_aio_request. I haven't carefully reviewed the implications of this
yet, but that should definitely be done before we merge the series.

Kevin