Integrate QCOW2 VDI import-export

[last-genius]

Final touches for qcow2 VDI import/export - add it as one of the supported formats and plumb through the calls to the python script for export and qcow-stream library for import via qcow_tool_wrapper and qcow-stream-tool.

qcow-stream-tool is a thin wrapper executable over qcow-stream, so that xapi doesn't have to use Lwt code in its process (it's not thread-safe, see #6573 for the discussion on this)

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This was tested manually, confirmed to have the same behaviour as the previous version (#6573)

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This PR requires the following additions to the specfile:

@@ -166,6 +172,7 @@ Requires: hwdata
 Requires: /usr/sbin/ssmtp
 Requires: stunnel >= 5.55
 Requires: vhd-tool
+Requires: qcow-stream-tool
 Requires: libffi
 Requires: busybox
 Requires: iproute
@@ -397,9 +404,15 @@ This packages contains plugins registering to the RRD daemon and exposing variou
 %package -n vhd-tool
 Summary: Command-line tools for manipulating and streaming .vhd format files

+%package -n qcow-stream-tool
+Summary: Minimal CLI wrapper for qcow-stream
+
 %description -n vhd-tool
 Simple command-line tools for manipulating and streaming .vhd format file.

+%description -n qcow-stream-tool
+Minimal CLI wrapper for qcow-stream
+
 %package -n xcp-networkd
 Summary:  Simple host network management service for the xapi toolstack
 Requires: ethtool
@@ -1339,6 +1353,9 @@ done
 /opt/xensource/libexec/get_nbd_extents.py
 /opt/xensource/libexec/python_nbd_client.py

+%files -n qcow-stream-tool
+%{_bindir}/qcow-stream-tool
+
 %files -n xcp-networkd
 %{_sbindir}/xcp-networkd
 %{_bindir}/networkd_db

[last-genius]

weird test failed, even though it passes locally and passed in my fork. i'm re-running it

[last-genius]

I am merging this. Please note the necessary change to the specfile given in the PR description.

[robhoes]

I am merging this. Please note the necessary change to the specfile given in the PR description.

It also needs a new xs-opam release...

[last-genius]

I am merging this. Please note the necessary change to the specfile given in the PR description.

It also needs a new xs-opam release...

Yes, indeed, preferrably with xapi-project/xs-opam#735 merged first.

Sorry, I missed that there hasn't been a new release in a month+