#!/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 . # # creator owner=stefanha@linux.vnet.ibm.com seq=`basename $0` echo "QA output created by $seq" here=`pwd` status=1 # failure is the default! _cleanup() { _cleanup_qemu rm -f "${TEST_IMG}.copy" _cleanup_test_img } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter . ./common.pattern . ./common.qemu # Any format supporting backing files except vmdk and qcow which do not support # smaller backing files. _supported_fmt qcow2 qed _supported_proto file _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=$(( base_size - 32 * 1024 )) TEST_IMG_SAVE="$TEST_IMG" TEST_IMG="$TEST_IMG.base" _make_test_img $base_size echo "Filling base image" echo # Fill end of base image with a pattern, skipping every other sector io writev $offset 512 1024 32 _check_test_img echo "Creating test image with backing file" echo TEST_IMG="$TEST_IMG_SAVE" _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 64 _check_test_img echo "Reading" echo # Base image sectors io readv $(( offset )) 512 1024 32 # Image sectors io readv $(( offset + 512 )) 512 1024 64 # Zero sectors beyond end of base image io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 _check_test_img # Rebase it on top of its base image $QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG" echo echo block-backup echo qemu_comm_method="monitor" _launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk h=$QEMU_HANDLE QEMU_COMM_TIMEOUT=1 # Silence output since it contains the disk image path and QEMU's readline # character echoing makes it very hard to filter the output. Plus, there # is no telling how many times the command will repeat before succeeding. _send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)" >/dev/null _send_qemu_cmd $h "" "Formatting" | _filter_img_create qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs" >/dev/null _send_qemu_cmd $h "info block-jobs" "No active jobs" _send_qemu_cmd $h 'quit' "" # Base image sectors TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32 # Image sectors TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64 # Zero sectors beyond end of base image TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 _check_test_img # success, all done echo "*** done" rm -f $seq.full status=0