1QA output created by 112 2 3=== refcount_bits limits === 4 5Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 6qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits 7Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 8qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits 9Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 10qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits 11Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 12qemu-img: TEST_DIR/t.IMGFMT: Refcount width must be a power of two and may not exceed 64 bits 13Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 14refcount bits: 1 15Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 16refcount bits: 64 17Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 18refcount bits: 16 19 20=== refcount_bits and compat=0.10 === 21 22Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 23refcount bits: 16 24Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 25qemu-img: TEST_DIR/t.IMGFMT: Different refcount widths than 16 bits require compatibility level 1.1 or above (use version=v3 or greater) 26Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 27qemu-img: TEST_DIR/t.IMGFMT: Different refcount widths than 16 bits require compatibility level 1.1 or above (use version=v3 or greater) 28 29=== Snapshot limit on refcount_bits=1 === 30 31Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 32refcount bits: 1 33wrote 512/512 bytes at offset 0 34512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 35qemu-img: Could not create snapshot 'foo': Invalid argument 36Leaked cluster 6 refcount=1 reference=0 37 381 leaked clusters were found on the image. 39This means waste of disk space, but no harm to data. 40 41=== Snapshot limit on refcount_bits=2 === 42 43Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 44refcount bits: 2 45wrote 512/512 bytes at offset 0 46512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 47qemu-img: Could not create snapshot 'baz': Invalid argument 48Leaked cluster 7 refcount=1 reference=0 49 501 leaked clusters were found on the image. 51This means waste of disk space, but no harm to data. 52 53=== Compressed clusters with refcount_bits=1 === 54 55Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 56refcount bits: 1 57wrote 65536/65536 bytes at offset 0 5864 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 59wrote 65536/65536 bytes at offset 65536 6064 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 61No errors were found on the image. 62 63=== MSb set in 64 bit refcount === 64 65Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 66refcount bits: 64 67wrote 512/512 bytes at offset 0 68512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 69wrote 512/512 bytes at offset 0 70512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 71 72=== Snapshot on maximum 64 bit refcount value === 73 74Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 75refcount bits: 64 76wrote 512/512 bytes at offset 0 77512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 78qemu-img: Could not create snapshot 'foo': Invalid argument 79Leaked cluster 5 refcount=18446744073709551615 reference=1 80Leaked cluster 6 refcount=1 reference=0 81 822 leaked clusters were found on the image. 83This means waste of disk space, but no harm to data. 84 85=== Amend from refcount_bits=16 to refcount_bits=1 === 86 87Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 88refcount bits: 16 89wrote 33554432/33554432 bytes at offset 16777216 9032 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 91No errors were found on the image. 92refcount bits: 1 93 94=== Amend from refcount_bits=1 to refcount_bits=64 === 95 96No errors were found on the image. 97refcount bits: 64 98 99=== Amend to compat=0.10 === 100 101qemu-img: compat=0.10 requires refcount_bits=16 102refcount bits: 64 103No errors were found on the image. 104refcount bits: 16 105refcount bits: 16 106qemu-img: Refcount widths other than 16 bits require compatibility level 1.1 or above (use compat=1.1 or greater) 107refcount bits: 16 108 109=== Amend with snapshot === 110 111wrote 16777216/16777216 bytes at offset 0 11216 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 113qemu-img: Cannot decrease refcount entry width to 1 bits: Cluster at offset 0x50000 has a refcount of 2 114No errors were found on the image. 115refcount bits: 16 116No errors were found on the image. 117refcount bits: 2 118 119=== Testing too many references for check === 120 121Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 122refcount bits: 1 123wrote 65536/65536 bytes at offset 0 12464 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 125ERROR: overflow cluster offset=0x50000 126Use qemu-img amend to increase the refcount entry width or qemu-img convert to create a clean copy if the image cannot be opened for writing 127 1281 errors were found on the image. 129Data may be corrupted, or further writes to the image may corrupt it. 130refcount bits: 2 131ERROR cluster 5 refcount=1 reference=2 132Repairing cluster 5 refcount=1 reference=2 133Repairing OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=2 134Repairing OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=2 135The following inconsistencies were found and repaired: 136 137 0 leaked clusters 138 3 corruptions 139 140Double checking the fixed image now... 141No errors were found on the image. 142 143=== Multiple walks necessary during amend === 144 145Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536 146wrote 29696/29696 bytes at offset 0 14729 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 148 (66.67/100%) 149 (50.00/100%) 150refcount bits: 64 151No errors were found on the image. 152*** done 153