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a7cd44bef3
When removeing support for qemu-img being able to create backing chains without embedded backing formats, we caused a poor error message as caught by iotest 114. Improve the situation to inform the user what went wrong. Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20210708155228.2666172-1-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
21 lines
1.0 KiB
Plaintext
21 lines
1.0 KiB
Plaintext
QA output created by 114
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.orig backing_fmt=raw
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
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qemu-img: Use of backing file requires explicit backing format
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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image: TEST_DIR/t.IMGFMT
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file format: IMGFMT
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virtual size: 64 MiB (67108864 bytes)
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cluster_size: 65536
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backing file: TEST_DIR/t.IMGFMT.base
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backing file format: foo
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qemu-io: can't open device TEST_DIR/t.qcow2: Could not open backing file: Unknown driver 'foo'
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no file open, try 'help open'
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read 4096/4096 bytes at offset 0
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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qemu-img: Could not change the backing file to 'TEST_DIR/t.qcow2.base': backing format must be specified
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read 4096/4096 bytes at offset 0
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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*** done
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