On Thu, Feb 11, 2021 at 16:37:58 +0100, Peter Krempa wrote:
> For incremental backup we need QEMU_CAPS_BLOCKDEV,
> QEMU_CAPS_BLOCKDEV_REOPEN, QEMU_CAPS_MIGRATION_PARAM_BLOCK_BITMAP_MAPPING.
> 
> Signed-off-by: Peter Krempa <pkre...@redhat.com>
> ---
>  src/qemu/qemu_capabilities.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
> index 38555dde98..7cc2532954 100644
> --- a/src/qemu/qemu_capabilities.c
> +++ b/src/qemu/qemu_capabilities.c
> @@ -5164,8 +5164,10 @@ virQEMUCapsInitQMPVersionCaps(virQEMUCapsPtr qemuCaps)
>  void
>  virQEMUCapsInitProcessCapsInterlock(virQEMUCapsPtr qemuCaps)
>  {
> -    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV))
> -        virQEMUCapsClear(qemuCaps, QEMU_CAPS_INCREMENTAL_BACKUP);
> +    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV) &&
> +        virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN) &&
> +        virQEMUCapsGet(qemuCaps, 
> QEMU_CAPS_MIGRATION_PARAM_BLOCK_BITMAP_MAPPING))
> +        virQEMUCapsSet(qemuCaps, QEMU_CAPS_INCREMENTAL_BACKUP);
> 
>      if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE) &&
>          !virQEMUCapsGet(qemuCaps, QEMU_CAPS_USB_STORAGE_WERROR)) {

Reviewed-by: Jiri Denemark <jdene...@redhat.com>

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