Test 1
{"execute": "block-dirty-bitmap-add", "arguments": {"disabled": false, "granularity": 16384, "name": "bitmap-0", "node": "drive0", "persistent": false}}
{"return": {}}
wrote 262144/262144 bytes at offset 0
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

qemu-img info dump:

image: TEST_IMG
file format: IMGFMT
virtual size: 1 MiB (1048576 bytes)
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    refcount bits: 16
    corrupt: false

No bitmap in JSON format output

Test 2
{"execute": "block-dirty-bitmap-add", "arguments": {"disabled": true, "granularity": 32768, "name": "bitmap-1", "node": "drive0", "persistent": true}}
{"return": {}}
wrote 262144/262144 bytes at offset 262144
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

qemu-img info dump:

image: TEST_IMG
file format: IMGFMT
virtual size: 1 MiB (1048576 bytes)
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    bitmaps:
        [0]:
            flags:
            name: bitmap-1
            granularity: 32768
    refcount bits: 16
    corrupt: false

The same bitmaps in JSON format:
[
  {
    "flags": [],
    "granularity": 32768,
    "name": "bitmap-1"
  }
]

Test 3
{"execute": "block-dirty-bitmap-add", "arguments": {"disabled": false, "granularity": 65536, "name": "bitmap-2", "node": "drive0", "persistent": true}}
{"return": {}}
wrote 262144/262144 bytes at offset 524288
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

qemu-img info dump:

image: TEST_IMG
file format: IMGFMT
virtual size: 1 MiB (1048576 bytes)
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    bitmaps:
        [0]:
            flags:
            name: bitmap-1
            granularity: 32768
        [1]:
            flags:
                [0]: auto
            name: bitmap-2
            granularity: 65536
    refcount bits: 16
    corrupt: false

The same bitmaps in JSON format:
[
  {
    "flags": [],
    "granularity": 32768,
    "name": "bitmap-1"
  },
  {
    "flags": [
      "auto"
    ],
    "granularity": 65536,
    "name": "bitmap-2"
  }
]

Test 4
Checking "in-use" flag...
qemu-img info dump:

image: TEST_IMG
file format: IMGFMT
virtual size: 1 MiB (1048576 bytes)
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    bitmaps:
        [0]:
            flags:
                [0]: in-use
            name: bitmap-1
            granularity: 32768
        [1]:
            flags:
                [0]: in-use
                [1]: auto
            name: bitmap-2
            granularity: 65536
    refcount bits: 16
    corrupt: false

The same bitmaps in JSON format:
[
  {
    "flags": [
      "in-use"
    ],
    "granularity": 32768,
    "name": "bitmap-1"
  },
  {
    "flags": [
      "in-use",
      "auto"
    ],
    "granularity": 65536,
    "name": "bitmap-2"
  }
]

Test 5
{"execute": "block-dirty-bitmap-add", "arguments": {"disabled": false, "granularity": 16384, "name": "bitmap-0", "node": "drive0", "persistent": true}}
{"return": {}}
Write an unknown bitmap flag '0x4' into a new QCOW2 image at offset 327695
qemu-img: Could not open 'TEST_IMG': Bitmap 'bitmap-0' doesn't satisfy the constraints

Unset the unknown bitmap flag '0x4' in the bitmap directory entry:

image: TEST_IMG
file format: IMGFMT
virtual size: 1 MiB (1048576 bytes)
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    bitmaps:
        [0]:
            flags:
                [0]: auto
            name: bitmap-0
            granularity: 16384
    refcount bits: 16
    corrupt: false

Test complete