[Qemu-block] [PATCH v7 0/6] add throttle block driver filter

[Manos Pitsidianakis]

This series adds a throttle block driver filter. Currently throttling is done
at the BlockBackend level. Using block driver interfaces we can move the
throttling to any point in the BDS graph using a throttle node which uses the
existing throttling code. This allows for potentially more complex
configurations (throttling at any point in the graph, chained filters)

v7:
  remove anonymous groups
  error on missing throttle-group option on block/throttle.c
  change switch case format in block/throttle-groups.c (berto)

v6:
  don't allow named group limit configuration in block/throttle.c; allow either
        -drive driver=throttle,file.filename=foo.qcow2, \
            limits.iops-total=...
      or
        -drive driver=throttle,file.filename=foo.qcow2,throttle-group=bar
  fixes suggested by berto

v5:
  fix crash in 'add aio_context field in ThrottleGroupMember'
  fix suggestions in block/throttle.c

v4:
  fix suggestions in block/throttle.c
  fix suggestions in block/throttle_groups.c
  add doc note in BlockDevOptionsThrottle

v3:
  fix style error in 'add aio_context field in ThrottleGroupMember'

v2:
  change QOM throttle group object name
  print valid ranges for uint on error
  move frees in throttle_group_obj_finalize()
  split throttle_group_{set,get}()
  add throttle_recurse_is_first_non_filter()

Manos Pitsidianakis (6):
  block: move ThrottleGroup membership to ThrottleGroupMember
  block: add aio_context field in ThrottleGroupMember
  block: tidy ThrottleGroupMember initializations
  block: convert ThrottleGroup to object with QOM
  block: add throttle block filter driver
  qemu-iotests: add 184 for throttle filter driver

 qapi/block-core.json            |  66 +++-
 include/block/throttle-groups.h |  48 ++-
 include/qemu/throttle-options.h |  60 ++--
 include/qemu/throttle.h         |   3 +
 include/sysemu/block-backend.h  |  20 +-
 block/block-backend.c           |  62 ++--
 block/qapi.c                    |   8 +-
 block/throttle-groups.c         | 737 +++++++++++++++++++++++++++++-----------
 block/throttle.c                | 250 ++++++++++++++
 blockdev.c                      |   4 +-
 tests/test-throttle.c           | 111 +++---
 util/throttle.c                 | 151 ++++++++
 block/Makefile.objs             |   1 +
 tests/qemu-iotests/184          | 205 +++++++++++
 tests/qemu-iotests/184.out      | 300 ++++++++++++++++
 tests/qemu-iotests/group        |   1 +
 16 files changed, 1706 insertions(+), 321 deletions(-)
 create mode 100644 block/throttle.c
 create mode 100755 tests/qemu-iotests/184
 create mode 100644 tests/qemu-iotests/184.out

-- 
2.11.0