[v6,0/6] tests/qtest: add some tests for virtio-net failover

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

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 (6):
  qtest/libqos: add a function to initialize secondary PCI buses
  tests/qtest: add some tests for virtio-net failover
  failover: fix unplug pending detection
  tests/libqtest: update virtio-net failover test
  test/libqtest: add some virtio-net failover migration cancelling tests
  tests/libqtest: add a migration test with two couples of failover
    devices

 hw/acpi/pcihp.c                   |   30 +-
 include/hw/pci/pci_bridge.h       |    8 +
 tests/qtest/libqos/pci.c          |  118 +++
 tests/qtest/libqos/pci.h          |    1 +
 tests/qtest/meson.build           |    3 +
 tests/qtest/virtio-net-failover.c | 1294 +++++++++++++++++++++++++++++
 6 files changed, 1451 insertions(+), 3 deletions(-)
 create mode 100644 tests/qtest/virtio-net-failover.c

On Mon, Dec 06, 2021 at 11:20:34PM +0100, Laurent Vivier wrote:
> This series adds a qtest entry to test virtio-net failover feature.

I think it's a good idea to CC me and Jason on the next version.
Thanks!


> 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
> 
> 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 (6):
>   qtest/libqos: add a function to initialize secondary PCI buses
>   tests/qtest: add some tests for virtio-net failover
>   failover: fix unplug pending detection
>   tests/libqtest: update virtio-net failover test
>   test/libqtest: add some virtio-net failover migration cancelling tests
>   tests/libqtest: add a migration test with two couples of failover
>     devices
> 
>  hw/acpi/pcihp.c                   |   30 +-
>  include/hw/pci/pci_bridge.h       |    8 +
>  tests/qtest/libqos/pci.c          |  118 +++
>  tests/qtest/libqos/pci.h          |    1 +
>  tests/qtest/meson.build           |    3 +
>  tests/qtest/virtio-net-failover.c | 1294 +++++++++++++++++++++++++++++
>  6 files changed, 1451 insertions(+), 3 deletions(-)
>  create mode 100644 tests/qtest/virtio-net-failover.c
> 
> -- 
> 2.33.1
> 
> 
> 
>