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iotests: Test preallocated truncate of 2G image

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Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180228131315.30194-3-mreitz@redhat.com
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2018-02-28 14:13:15 +01:00
parent 82b45e0a0b
commit 733d1dce0f
2 changed files with 34 additions and 0 deletions
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24
tests/qemu-iotests/106
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@ -86,6 +86,30 @@ for growth_mode in falloc full off; do
$QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
done
echo
echo '=== Testing image growth on 2G empty image ==='
for growth_mode in falloc full; do
echo
echo "--- growth_mode=$growth_mode ---"
# Maybe we want to do an lseek() to the end of the file before the
# preallocation; if the file has a length of 2 GB, that would
# return an integer that overflows to negative when put into a
# plain int. We should use the correct type for the result, and
# this tests we do.
_make_test_img 2G
$QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
if [ $actual_size -lt $GROWTH_SIZE ]; then
echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
fi
done
# success, all done
echo '*** done'
rm -f $seq.full

10
tests/qemu-iotests/106.out
View File

@ -47,4 +47,14 @@ qemu-img: Preallocation can only be used for growing images
--- growth_mode=off ---
Image resized.
=== Testing image growth on 2G empty image ===
--- growth_mode=falloc ---
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648
Image resized.
--- growth_mode=full ---
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648
Image resized.
*** done