[PATCH 0/6] block-copy: make helper APIs thread safe

[Emanuele Giuseppe Esposito]

This serie of patches bring thread safety to the smaller APIs used by
block-copy, namely ratelimit, progressmeter, co-shared-resource
and aiotask.
The end goal is to reduce the usage of the global
AioContexlock in block-copy, by introducing smaller granularity
locks thus on making the block layer thread safe. 

This serie depends on Paolo's coroutine_sleep API.

What's missing for block-copy to be fully thread-safe is fixing
the CoSleep API to allow cross-thread sleep and wakeup.
Paolo is working on it and will post the patches once his new
CoSleep API is accepted.

Patches 1-3 work on ratelimit (they are also based on the first
ratelimit patch sent by Paolo), 4 covers progressmeter,
5 co-shared-resources and 6 aiopool.

Based-on: <20210503112550.478521-1-pbonzini@redhat.com> [coroutine_sleep]
Based-on: <20210413125533.217440-1-pbonzini@redhat.com> [ratelimit]
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
v1 -> v2:
* More field categorized as IN/State/OUT in the various struct
* Fix a couple of places where I missed locks [Vladimir, Paolo]

Emanuele Giuseppe Esposito (3):
  progressmeter: protect with a mutex
  co-shared-resource: protect with a mutex
  aiopool: protect with a mutex

Paolo Bonzini (3):
  ratelimit: treat zero speed as unlimited
  block-copy: let ratelimit handle a speed of 0
  blockjob: let ratelimit handle a speed of 0

 block/aio_task.c               | 63 ++++++++++++++++++++--------------
 block/block-copy.c             | 28 ++++++---------
 blockjob.c                     | 45 +++++++++++++++---------
 include/block/aio_task.h       |  2 +-
 include/qemu/progress_meter.h  | 31 +++++++++++++++++
 include/qemu/ratelimit.h       | 12 +++++--
 job-qmp.c                      |  8 +++--
 job.c                          |  3 ++
 qemu-img.c                     |  9 +++--
 util/qemu-co-shared-resource.c | 26 +++++++++++---
 10 files changed, 155 insertions(+), 72 deletions(-)

-- 
2.30.2