[libvirt] [PATCH 0/4] qemu: export disk snapshot capability

This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Without this patch series, the only way to know if QEMU has this support is to actually request a disk snapshot and to see what happens. The change is split in four patches: * patch #1 actually adds the new element in the QEMU capabilities XML. formatcaps.html.in wasn't very detailed about the actual XML format, so I've not updated it. Anyone feel free to point out what should be added, and I'll comply. The new element has the form <disksnapshot default='value' toggle='off'> because I'd like to convey two informations: - disk snapshot is supposed to be here, and it is (default='on') - disk snapshot is supposed to be here, and is NOT (default='off') Put in a different way, I tried to help the client as much as possible. I'm not particolary fond of this format, and I'm really open to alternatives here. Perhaps a simpler <disksnapshot/> element can convey the same meaning? Suggestions welcome. * patches #2, #3 Are trivial and they provide the ground for the last patch which add a new unit tests. They are just dependencies for it. I tried to make them less invasive as possible. * patch #4 add a new unit test, aiming to test not only this new feature but also the whole XML capabilities test. I was under the impression that this kind of test do not really fit into existing one, so I added a new one. Suggestions about possible improvements for this test are welcome Francesco Romani (4): qemu: export disk snapshot support in capabilities qemu: add function to fill capabilities cache qemu: export the virQEMUCapsInitGuest function. qemu: add unit tests for the capabilities xml .gitignore | 1 + docs/schemas/capability.rng | 6 + src/qemu/qemu_capabilities.c | 40 +++- src/qemu/qemu_capabilities.h | 4 + tests/Makefile.am | 10 +- tests/qemucaps2xmldata/all_1.6.0-1.caps | 142 ++++++++++++++ tests/qemucaps2xmldata/all_1.6.0-1.xml | 51 +++++ tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.caps | 141 +++++++++++++ tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.xml | 51 +++++ tests/qemucaps2xmltest.c | 217 +++++++++++++++++++++ 10 files changed, 655 insertions(+), 8 deletions(-) create mode 100644 tests/qemucaps2xmldata/all_1.6.0-1.caps create mode 100644 tests/qemucaps2xmldata/all_1.6.0-1.xml create mode 100644 tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.caps create mode 100644 tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.xml create mode 100644 tests/qemucaps2xmltest.c -- 1.8.4.2