[PATCH v7 0/4] tests/qtest: add some tests for virtio-net failover

[Laurent Vivier <lvivier@redhat.com>]

This series adds a qtest entry to test virtio-net failover feature.

We check following error cases:

- check missing id on device with failover_pair_id triggers an error
- check a primary device plugged on a bus that doesn't support hotplug
  triggers an error

We check the status of the machine before and after hotplugging cards and
feature negotiation:

- check we don't see the primary device at boot if failover is on
- check we see the primary device at boot if failover is off
- check we don't see the primary device if failover is on
  but failover_pair_id is not the one with on (I think this should be changed)
- check the primary device is plugged after the feature negotiation
- check the result if the primary device is plugged before standby device and
  vice-versa
- check the if the primary device is coldplugged and the standy device
  hotplugged and vice-versa
- check the migration triggers the unplug and the hotplug

There is one preliminary patch in the series:

- PATCH 1 introduces a function to enable PCI bridge.
  Failover needs to be plugged on a pcie-root-port and while
  the root port is not configured the cards behind it are not
  available

v7:
- merge patch 3 and 4 as the fix for ACPI unplug has been merged
- address Thomas' comments
- add a dependency on slirp in meson.build
- check FAILOVER_NEGOCIATED device-id and MIGRATION status
  on destination, update UNPLUG_PRIMARY event checking
- fix an object_unref() in test_migrate_abort_active()
- fix typo s/whan/when/

v6:
- manage more than 2 root ports
- add a function to check if a card is available or not
- check migration state
- add cancelled migration test cases
- rename tests

v5:
- re-add the wait-unplug test that has been removed from v4 by mistake.

v4:
- rely on query-migrate status to know the migration state rather than
  to wait the STOP event.
- remove the patch to add time out to qtest_qmp_eventwait()

v3:
- fix a bug with ACPI unplug and add the related test

v2:
- remove PATCH 1 that introduced a function that can be replaced by
  qobject_to_json_pretty() (Markus)
- Add migration to a file and from the file to check the card is
  correctly unplugged on the source, and hotplugged on the dest
- Add an ACPI call to eject the card as the kernel would do

Laurent Vivier (4):
  qtest/libqos: add a function to initialize secondary PCI buses
  tests/qtest: add some tests for virtio-net failover
  test/libqtest: add some virtio-net failover migration cancelling tests
  tests/libqtest: add a migration test with two couples of failover
    devices

 include/hw/pci/pci_bridge.h       |    8 +
 tests/qtest/libqos/pci.c          |  118 +++
 tests/qtest/libqos/pci.h          |    1 +
 tests/qtest/meson.build           |    4 +
 tests/qtest/virtio-net-failover.c | 1324 +++++++++++++++++++++++++++++
 5 files changed, 1455 insertions(+)
 create mode 100644 tests/qtest/virtio-net-failover.c

-- 
2.33.1