| #!/bin/bash |
| # |
| # 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@linux.vnet.ibm.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 |
| _supported_os Linux |
| |
| |
| 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 |
