[PATCH v4 07/11] qemu: hotplug: Remove overlay of <transient> disk on disk unplug

[Masayoshi Mizuma]

On Thu, Sep 24, 2020 at 01:43:54PM +0200, Peter Krempa wrote:
> Remove the overlay if the disk was <transient/>. Note that even if we'd
> forbid unplug of such a disk through the API, the disk can still be
> ejected from the guest.
> 
> Signed-off-by: Peter Krempa <pkrempa at redhat.com>
> ---
>  src/qemu/qemu_hotplug.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
> index ed4d1580fa..11b549b12b 100644
> --- a/src/qemu/qemu_hotplug.c
> +++ b/src/qemu/qemu_hotplug.c
> @@ -4313,6 +4313,15 @@ qemuDomainRemoveDiskDevice(virQEMUDriverPtr driver,
>          qemuHotplugRemoveManagedPR(driver, vm, QEMU_ASYNC_JOB_NONE) < 0)
>          goto cleanup;
> 
> +    if (disk->transient) {
> +        VIR_DEBUG("Removing transient overlay '%s' of disk '%s'",
> +                  disk->src->path, disk->dst);
> +        if (qemuDomainStorageFileInit(driver, vm, disk->src, NULL) >= 0) {
> +            virStorageFileUnlink(disk->src);
> +            virStorageFileDeinit(disk->src);
> +        }
> +    }
> +
>      ret = 0;
> 
>   cleanup:
> -- 

Tested-by: Masayoshi Mizuma <m.mizuma at jp.fujitsu.com>

Thanks a lot!
Masa