Separate QUORUM_REPORT_BAD events according to their node name

QUORUM_REPORT_BAD events are limited to a maximum rate of 1 per second. While this is not a problem in itself, this means that an error in one a Quorum child will mask errors in the other children if they happen within the same 1 second interval.

This series fixes that problem by separating these events in different queues if they come from different nodes. Once we add the 'type' field to QUORUM_REPORT_BAD we will also be able to classify them according to the type if we want.

In addition to the above, this series also fixes a crash that happens if there's an I/O error in one of the children. This is serious enough so I'll send the patch to fix this crash to qemu-stable as well.

Regards,

Berto

v2:
- Patch 3: Rename clock_type to event_clock_type [Max]

v1: https://lists.gnu.org/archive/html/qemu-devel/2016-03/msg02161.html
- Original version

Alberto Garcia (4):
quorum: Fix crash in quorum_aio_cb()
monitor: Separate QUORUM_REPORT_BAD events according to the node name
monitor: Use QEMU_CLOCK_VIRTUAL for the event queue in qtest mode
iotests: Add test for QMP event rates

 block/quorum.c             |  12 +++--
 monitor.c                  |  22 ++++++--
 tests/qemu-iotests/146     | 129 +++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/146.out |   5 ++
 tests/qemu-iotests/group   |   1 +
 5 files changed, 161 insertions(+), 8 deletions(-)
 create mode 100644 tests/qemu-iotests/146
 create mode 100644 tests/qemu-iotests/146.out

2.7.0