On Fri 27 Mar 2020 07:13:04 PM CET, Eric Blake wrote:
+for qcow2_compat in 0.10 1.1; do
+ echo "# Create an image with compat=$qcow2_compat without a backing file"
+ _make_test_img -o "compat=$qcow2_compat" 128k
+
+ echo "# Fill all clusters with data and then discard them"
+ $QEMU_IO -c 'write -P 0x01 0 128k' "$TEST_IMG" | _filter_qemu_io
+ $QEMU_IO -c 'discard 0 128k' "$TEST_IMG" | _filter_qemu_io
+
+ echo "# Read the data from the discarded clusters"
+ $QEMU_IO -c 'read -P 0x00 0 128k' "$TEST_IMG" | _filter_qemu_io
+done
Should this loop also inspect qemu-img map output?
I guess we can, although here the image is completely unallocated in
both cases.