4 # Test that sub-cluster allocating writes zero the rest of the cluster
6 # Copyright (C) 2010 IBM, Corp.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23 owner=stefanha@redhat.com
26 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 _supported_fmt vmdk qcow qcow2 qed
41 _supported_proto generic
42 _unsupported_imgopts "subformat=streamOptimized"
47 subcluster_offset=1024
51 # This first write causes an L2 table to be allocated so that the next write
52 # doesn't need to allocate one and is therefore at the end of the image file.
53 # Otherwise an L2 table could get in the way after the data cluster.
55 echo "== writing first cluster to populate metadata =="
56 $QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io
59 echo "== writing at sub-cluster granularity =="
60 $QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
63 echo "== verify pattern =="
64 $QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
67 echo "== verify zeroes before sub-cluster pattern =="
68 $QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io
71 echo "== verify zeroes after sub-cluster pattern =="
72 $QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io