636192c4b6
Having to fire up qemu, then use QMP commands for nbd-server-start and nbd-server-add, just to expose a persistent dirty bitmap, is rather tedious. Make it possible to expose a dirty bitmap using just qemu-nbd (of course, for now this only works when qemu-nbd is visiting a BDS formatted as qcow2). Of course, any good feature also needs unit testing, so expand iotest 223 to cover it. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20190111194720.15671-9-eblake@redhat.com>
83 lines
3.4 KiB
Plaintext
83 lines
3.4 KiB
Plaintext
QA output created by 223
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=== Create partially sparse image, then add dirty bitmaps ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4194304
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wrote 2097152/2097152 bytes at offset 1048576
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2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Testing:
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QMP_VERSION
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{"return": {}}
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{"return": {}}
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{"return": {}}
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{"return": {}}
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{"return": {}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
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=== Write part of the file under active bitmap ===
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wrote 512/512 bytes at offset 512
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 2097152/2097152 bytes at offset 2097152
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2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== End dirty bitmaps, and start serving image over NBD ===
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{"return": {}}
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{"return": {}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "NBD server not running"}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "NBD server already running"}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "Cannot find device=nosuch nor node_name=nosuch"}}
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{"error": {"class": "GenericError", "desc": "NBD server already has export named 'n'"}}
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{"error": {"class": "GenericError", "desc": "Enabled bitmap 'b2' incompatible with readonly export"}}
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{"error": {"class": "GenericError", "desc": "Bitmap 'b3' is not found"}}
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{"return": {}}
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=== Contrast normal status to large granularity dirty-bitmap ===
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read 512/512 bytes at offset 512
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 524288/524288 bytes at offset 524288
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1048576/1048576 bytes at offset 1048576
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 2097152/2097152 bytes at offset 2097152
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2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 4096, "depth": 0, "zero": false, "data": true},
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{ "start": 4096, "length": 1044480, "depth": 0, "zero": true, "data": false},
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{ "start": 1048576, "length": 3145728, "depth": 0, "zero": false, "data": true}]
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[{ "start": 0, "length": 65536, "depth": 0, "zero": false, "data": false},
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{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true},
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{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
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=== Contrast to small granularity dirty-bitmap ===
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[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true},
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{ "start": 512, "length": 512, "depth": 0, "zero": false, "data": false},
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{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true},
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{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
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=== End qemu NBD server ===
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{"return": {}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "Export 'n2' is not found"}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "NBD server not running"}}
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{"return": {}}
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=== Use qemu-nbd as server ===
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[{ "start": 0, "length": 65536, "depth": 0, "zero": false, "data": false},
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{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true},
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{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
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[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true},
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{ "start": 512, "length": 512, "depth": 0, "zero": false, "data": false},
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{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true},
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{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
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*** done
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