[libvirt] [PATCH 5/8] qemu: caps: Add capability for dynamic 'auto-read-only' support for files

[Daniel P. Berrangé]

On Mon, Nov 18, 2019 at 06:02:05PM +0100, Peter Krempa wrote:
> Initial implementation of 'auto-read-only' didn't reopen the backing
> files when needed. For '-blockdev' to work we need to be able to tel
> qemu to open a file read-only and change it during blockjobs as we label
> backing chains with a sVirt label which does not allow writing. The
> dynamic auto-read-only supports this as it reopens files when writing
> is demanded.
> 
> Add a capability to detect that the posix file based backends support
> the dynamic part.
> 
> Signed-off-by: Peter Krempa <pkrempa at redhat.com>
> Reviewed-by: Jiri Denemark <jdenemar at redhat.com>
> ---
>  src/qemu/qemu_capabilities.c                      | 2 ++
>  src/qemu/qemu_capabilities.h                      | 1 +
>  tests/qemucapabilitiesdata/caps_4.1.0.x86_64.xml  | 1 +
>  tests/qemucapabilitiesdata/caps_4.2.0.aarch64.xml | 1 +
>  tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml   | 1 +
>  tests/qemucapabilitiesdata/caps_4.2.0.x86_64.xml  | 1 +
>  6 files changed, 7 insertions(+)

Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>


Regards,
Daniel
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