| #!/bin/bash |
| # |
| # Test that backing files can be smaller than the image |
| # |
| # Copyright (C) 2010 IBM, Corp. |
| # |
| # Based on 017: |
| # Copyright (C) 2009 Red Hat, Inc. |
| # |
| # 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" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| 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 |
| . ./common.pattern |
| |
| # Any format supporting backing files except vmdk and qcow which do not support |
| # smaller backing files. |
| _supported_fmt qcow2 qed |
| _supported_os Linux |
| |
| # Choose a size that is not necessarily a cluster size multiple for image |
| # formats that use clusters. This will ensure that the base image doesn't end |
| # precisely on a cluster boundary (the easy case). |
| image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 )) |
| |
| # The base image is smaller than the image file |
| base_size=$(( image_size - 1024 * 1024 * 1024 )) |
| |
| offset=$(( base_size - 32 * 1024 )) |
| |
| _make_test_img $base_size |
| |
| echo "Filling base image" |
| echo |
| |
| # Fill end of base image with a pattern, skipping every other sector |
| io writev $offset 512 1024 31 |
| |
| _check_test_img |
| |
| echo "Creating test image with backing file" |
| echo |
| |
| mv $TEST_IMG $TEST_IMG.base |
| _make_test_img -b $TEST_IMG.base $image_size |
| |
| echo "Filling test image" |
| echo |
| |
| # Write every other sector around where the base image ends |
| io writev $(( offset + 512 )) 512 1024 63 |
| |
| _check_test_img |
| |
| echo "Reading" |
| echo |
| |
| # Base image sectors |
| io readv $(( offset )) 512 1024 31 |
| |
| # Image sectors |
| io readv $(( offset + 512 )) 512 1024 63 |
| |
| # Zero sectors beyond end of base image |
| io_zero readv $(( offset + 32 * 1024 )) 512 1024 31 |
| |
| _check_test_img |
| |
| # success, all done |
| echo "*** done" |
| rm -f $seq.full |
| status=0 |