v3 -> v4:
- Hanna pointed out that 'throttle type' is not clear enough,
  'throttle direction' would be better in the v3.
  Use 'ThrottleDirection' instead, also rename 'ThrottleType throttle' to 'ThrottleDirection direction'.

- For patch 'throttle: support read-only and write-only', reduce codes by:
for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) {
    ...
}

- Add commit message for the removed 'FIXME' tag.

- Append 'throttle: use THROTTLE_MAX/ARRAY_SIZE for hard code'
- Append 'fsdev: Use ThrottleDirection instread of bool is_write'
- Append 'block/throttle-groups: Use ThrottleDirection instread of bool is_write'

Finally, 'bool is_write' has been fully removed from throttle related codes,
'type foo[2]' becomes 'type foo[THROTTLE_MAX]'.

v2 -> v3:
- patch 1 -> patch 5 are already reviewed by Alberto
- append patch 6: throttle: use enum ThrottleType instead of bool is_write

v1 -> v2:
- rename 'ThrottleTimerType' to 'ThrottleType'
- add assertion to throttle_schedule_timer

v1:
- introduce enum ThrottleTimerType instead of timers[0], timer[1]...
- support read-only and write-only for throttle
- adapt related test codes
- cryptodev uses a write-only throttle timer

Zhenwei Pi (9):
  throttle: introduce enum ThrottleDirection
  test-throttle: use enum ThrottleDirection
  throttle: support read-only and write-only
  test-throttle: test read only and write only
  cryptodev: use NULL throttle timer cb for read direction
  throttle: use enum ThrottleDirection instead of bool is_write
  throttle: use THROTTLE_MAX/ARRAY_SIZE for hard code
  fsdev: Use ThrottleDirection instread of bool is_write
  block/throttle-groups: Use ThrottleDirection instread of bool is_write

 backends/cryptodev.c            |  12 ++--
 block/throttle-groups.c         | 107 ++++++++++++++++----------------
 block/throttle.c                |   8 +--
 fsdev/qemu-fsdev-throttle.c     |  18 +++---
 fsdev/qemu-fsdev-throttle.h     |   4 +-
 hw/9pfs/cofile.c                |   4 +-
 include/block/throttle-groups.h |   6 +-
 include/qemu/throttle.h         |  16 +++--
 tests/unit/test-throttle.c      |  76 +++++++++++++++++++++--
 util/throttle.c                 |  84 +++++++++++++++----------
 10 files changed, 216 insertions(+), 119 deletions(-)

-- 
2.34.1