iotests/028: Add test for cross-base-EOF reads
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200728120806.265916-3-mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tested-by: Claudio Fontana <cfontana@suse.de>
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@ -142,6 +142,25 @@ TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
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_check_test_img
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_check_test_img
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echo
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echo '=== Reading across backing EOF in one operation ==='
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echo
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# Use a cluster boundary as the base end here
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base_size=$((3 * 1024 * 1024 * 1024))
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TEST_IMG="$TEST_IMG.base" _make_test_img $base_size
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_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size
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# Write 16 times 42 at the end of the base image
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$QEMU_IO -c "write -P 42 $((base_size - 16)) 16" "$TEST_IMG.base" \
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| _filter_qemu_io
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# Read 32 bytes across the base EOF from the top;
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# should be 16 times 0x2a, then 16 times 0x00
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$QEMU_IO -c "read -v $((base_size - 16)) 32" "$TEST_IMG" \
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| _filter_qemu_io
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# success, all done
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# success, all done
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echo "*** done"
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echo "*** done"
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rm -f $seq.full
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rm -f $seq.full
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@ -730,4 +730,15 @@ read 512/512 bytes at offset 3221257728
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read 512/512 bytes at offset 3221258752
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read 512/512 bytes at offset 3221258752
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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No errors were found on the image.
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No errors were found on the image.
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=== Reading across backing EOF in one operation ===
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=3221225472
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4294968832 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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wrote 16/16 bytes at offset 3221225456
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16 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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bffffff0: 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a ................
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c0000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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read 32/32 bytes at offset 3221225456
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32 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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*** done
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*** done
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