Re: [Qemu-devel] [PATCH] ide: Add resize callback to ide/core

[Stefan Hajnoczi]

On Tue, Aug 12, 2014 at 02:44:09PM -0400, John Snow wrote:
> Currently, if the block device backing the IDE drive is resized,
> the information about the device as cached inside of the IDEState
> structure is not updated, thus when a guest OS re-queries the drive,
> it is unable to see the expanded size.
> 
> This patch adds a resize callback to correct this, and marks the
> identify buffer cache as being dirty to force ide_identify to
> regenerate this information. This callback also attempts to update
> the legacy CHS values, if only to maintain a sense of
> informational consistency.
> 
> Lastly, a Linux guest as-is cannot resize a libata drive while in-use,
> but it can see the expanded size as part of a bus rescan event.
> This patch also allows guests such as Linux to see the new drive size
> after a soft reboot event, without having to exit the QEMU process.
> 
> Signed-off-by: John Snow <address@hidden>
> ---
>  hw/ide/core.c | 29 +++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan

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