| #!/usr/bin/env bash | |
| # group: rw auto quick | |
| # | |
| # Test that sub-cluster allocating writes zero the rest of the cluster | |
| # | |
| # Copyright (C) 2010 IBM, Corp. | |
| # | |
| # This program is free software; you can redistribute it and/or modify | |
| # it under the terms of the GNU General Public License as published by | |
| # the Free Software Foundation; either version 2 of the License, or | |
| # (at your option) any later version. | |
| # | |
| # This program is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| # GNU General Public License for more details. | |
| # | |
| # You should have received a copy of the GNU General Public License | |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| # | |
| # creator | |
| owner=stefanha@redhat.com | |
| seq=`basename $0` | |
| echo "QA output created by $seq" | |
| status=1 # failure is the default! | |
| _cleanup() | |
| { | |
| _cleanup_test_img | |
| } | |
| trap "_cleanup; exit \$status" 0 1 2 3 15 | |
| # get standard environment, filters and checks | |
| . ./common.rc | |
| . ./common.filter | |
| _supported_fmt vmdk qcow qcow2 qed | |
| _supported_proto generic | |
| _unsupported_imgopts "subformat=streamOptimized" | |
| size=128M | |
| cluster_size=65536 | |
| subcluster_offset=1024 | |
| subcluster_size=2048 | |
| _make_test_img $size | |
| # This first write causes an L2 table to be allocated so that the next write | |
| # doesn't need to allocate one and is therefore at the end of the image file. | |
| # Otherwise an L2 table could get in the way after the data cluster. | |
| echo | |
| echo "== writing first cluster to populate metadata ==" | |
| $QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io | |
| echo | |
| echo "== writing at sub-cluster granularity ==" | |
| $QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io | |
| echo | |
| echo "== verify pattern ==" | |
| $QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io | |
| echo | |
| echo "== verify zeroes before sub-cluster pattern ==" | |
| $QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io | |
| echo | |
| echo "== verify zeroes after sub-cluster pattern ==" | |
| $QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io | |
| # success, all done | |
| echo "*** done" | |
| rm -f $seq.full | |
| status=0 |