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qemu-iotests: improve test for qemu-img convert with backing file

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Additionally to testing the qemu-img convert -B option, also test
-o backing_file.

Also, the old test acidentlly used a pattern of zeros for most of the writes,
so that the allocation test didn't really work out. This is fixed by using an
explicit pattern.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Kevin Wolf 2010-10-15 07:53:00 -07:00
parent 72bb202583
commit 2547caa169
1 changed files with 40 additions and 27 deletions
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67
tests/qemu-iotests/019
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@ -57,10 +57,10 @@ echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io writev $(( offset )) 512 1024 64
io_pattern writev $(( offset )) 512 1024 64 42
# Complete backing clusters
io writev $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1
io_pattern writev $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1 42
done
_check_test_img
@ -75,40 +75,53 @@ echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io writev $(( offset + 512 )) 512 1024 64
io_pattern writev $(( offset + 512 )) 512 1024 64 43
# Complete test image clusters
io writev $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1
io_pattern writev $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1 43
done
_check_test_img
mv $TEST_IMG $TEST_IMG.orig
$QEMU_IMG convert -O $IMGFMT -B $TEST_IMG.base $TEST_IMG.orig $TEST_IMG
echo "Checking if backing clusters are allocated when they shouldn't"
echo
for offset in $TEST_OFFSETS; do
# Complete backing clusters
is_allocated $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1
# Test the conversion twice: One test with the old-style -B option and another
# one with -o backing_file
for backing_option in "-B $TEST_IMG.base" "-o backing_file=$TEST_IMG.base"; do
echo
echo Testing conversion with $backing_option
echo
$QEMU_IMG convert -O $IMGFMT $backing_option $TEST_IMG.orig $TEST_IMG
echo "Checking if backing clusters are allocated when they shouldn't"
echo
for offset in $TEST_OFFSETS; do
# Complete backing clusters
is_allocated $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1
done
echo "Reading"
echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io_pattern readv $(( offset )) 512 1024 64 42
io_pattern readv $(( offset + 512 )) 512 1024 64 43
# Complete test image clusters
io_pattern readv $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1 42
io_pattern readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1 43
# Empty sectors
io_zero readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE * 4 )) $CLUSTER_SIZE $CLUSTER_SIZE 1
done
_check_test_img
done
echo "Reading"
echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io readv $(( offset )) 512 1024 64
io readv $(( offset + 512 )) 512 1024 64
# Complete test image clusters
io readv $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1
io readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1
# Empty sectors
io_zero readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE * 4 )) $CLUSTER_SIZE $CLUSTER_SIZE 1
done
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full