3 # Test case for discarding preallocated zero clusters in qcow2
5 # Copyright (C) 2013 Red Hat, Inc.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22 owner
=mreitz@redhat.com
25 echo "QA output created by $seq"
28 status
=1 # failure is the default!
34 trap "_cleanup; exit \$status" 0 1 2 3 15
36 # get standard environment, filters and checks
40 # This tests qocw2-specific low-level functionality
42 _supported_proto generic
45 # Intentionally create an unaligned image
47 IMG_SIZE
=$
((64 * 1024 * 1024 + 512))
50 echo "=== Testing cluster discards ==="
52 _make_test_img
$IMG_SIZE
53 # Write some normal clusters, zero some of them (creating preallocated
54 # zero clusters) and discard everything. Everything should now read as 0.
55 $QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "write 64M 512" \
56 -c "discard 0 $IMG_SIZE" -c "read -P 0 0 $IMG_SIZE" "$TEST_IMG" \
58 # Check the image (there shouldn't be any leaks)