QA output created by 198
== create base ==
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=16777216

== writing whole image base ==
wrote 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== create overlay ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=16777216 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT

== writing whole image layer ==
wrote 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern base ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern layer ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== committing layer into base ==
Image committed.

== verify pattern base ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern layer ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== checking image base ==
image: json:{ /* filtered */ }
file format: IMGFMT
virtual size: 16 MiB (16777216 bytes)
Format specific information:
    compression type: COMPRESSION_TYPE
    encrypt:
        ivgen alg: plain64
        detached header: false
        hash alg: sha256
        cipher alg: aes-256
        uuid: 00000000-0000-0000-0000-000000000000
        format: luks
        cipher mode: xts
        slots:
            [0]:
                active: true
                iters: 1024
                key offset: 4096
                stripes: 4000
            [1]:
                active: false
                key offset: 262144
            [2]:
                active: false
                key offset: 520192
            [3]:
                active: false
                key offset: 778240
            [4]:
                active: false
                key offset: 1036288
            [5]:
                active: false
                key offset: 1294336
            [6]:
                active: false
                key offset: 1552384
            [7]:
                active: false
                key offset: 1810432
        payload offset: 2068480
        master key iters: 1024

== checking image layer ==
image: json:{ /* filtered */ }
file format: IMGFMT
virtual size: 16 MiB (16777216 bytes)
backing file: TEST_DIR/t.IMGFMT.base
backing file format: IMGFMT
Format specific information:
    compression type: COMPRESSION_TYPE
    encrypt:
        ivgen alg: plain64
        detached header: false
        hash alg: sha256
        cipher alg: aes-256
        uuid: 00000000-0000-0000-0000-000000000000
        format: luks
        cipher mode: xts
        slots:
            [0]:
                active: true
                iters: 1024
                key offset: 4096
                stripes: 4000
            [1]:
                active: false
                key offset: 262144
            [2]:
                active: false
                key offset: 520192
            [3]:
                active: false
                key offset: 778240
            [4]:
                active: false
                key offset: 1036288
            [5]:
                active: false
                key offset: 1294336
            [6]:
                active: false
                key offset: 1552384
            [7]:
                active: false
                key offset: 1810432
        payload offset: 2068480
        master key iters: 1024
*** done