Block layer patches:

- Support for FUSE exports
- Fix deadlock in bdrv_co_yield_to_drain()
- Use lock guard macros
- Some preparational patches for 64 bit block layer
- file-posix: Fix request extension to INT64_MAX in raw_do_pwrite_zeroes()

# gpg: Signature made Fri 11 Dec 2020 17:06:19 GMT
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (34 commits)
  block: Fix deadlock in bdrv_co_yield_to_drain()
  block: Fix locking in qmp_block_resize()
  block: Simplify qmp_block_resize() error paths
  block: introduce BDRV_MAX_LENGTH
  block/io: bdrv_check_byte_request(): drop bdrv_is_inserted()
  block/io: bdrv_refresh_limits(): use ERRP_GUARD
  block/file-posix: fix workaround in raw_do_pwrite_zeroes()
  can-host: Fix crash when 'canbus' property is not set
  iotests/221: Discard image before qemu-img map
  file-posix: check the use_lock before setting the file lock
  iotests/308: Add test for FUSE exports
  iotests: Enable fuse for many tests
  iotests: Allow testing FUSE exports
  iotests: Give access to the qemu-storage-daemon
  storage-daemon: Call bdrv_close_all() on exit
  iotests/287: Clean up subshell test image
  iotests: Let _make_test_img guess $TEST_IMG_FILE
  iotests: Restrict some Python tests to file
  iotests/091: Use _cleanup_qemu instad of "wait"
  iotests: Derive image names from $TEST_IMG
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>