1#!/usr/bin/env bash 2# 3# Rebasing COW images 4# 5# Copyright (C) 2009 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=kwolf@redhat.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 _rm_test_img "$TEST_DIR/t.$IMGFMT.base_old" 33 _rm_test_img "$TEST_DIR/t.$IMGFMT.base_new" 34 35 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT" 36 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_old" 37 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_new" 38 rmdir "$TEST_DIR/subdir" 2> /dev/null 39} 40trap "_cleanup; exit \$status" 0 1 2 3 15 41 42# get standard environment, filters and checks 43. ./common.rc 44. ./common.filter 45. ./common.pattern 46 47# Currently only qcow2 and qed support rebasing 48_supported_fmt qcow2 qed 49_supported_proto file 50_supported_os Linux 51 52CLUSTER_SIZE=65536 53 54# Cluster allocations to be tested: 55# 56# Backing (old) 11 -- 11 -- 11 -- 11 -- 57# Backing (new) 22 22 -- -- 22 22 -- -- 58# COW image 33 33 33 33 -- -- -- -- 59# 60# The pattern is written twice to have both an alloc -> non-alloc and a 61# non-alloc -> alloc transition in the COW image. 62 63echo "Creating backing file" 64echo 65 66TEST_IMG_SAVE="$TEST_IMG" 67TEST_IMG="$TEST_IMG.base_old" 68 69_make_test_img 1G 70io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11 71 72TEST_IMG="$TEST_IMG_SAVE.base_new" 73 74echo "Creating new backing file" 75echo 76 77_make_test_img 1G 78io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22 79 80 81TEST_IMG="$TEST_IMG_SAVE" 82 83echo "Creating COW image" 84echo 85 86_make_test_img -b "$TEST_IMG.base_old" 1G 87io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33 88io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33 89 90echo "Read before the rebase to make sure everything is set up correctly" 91echo 92io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 93io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 94io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 95io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 96io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 97io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 98io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 99io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 100io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 101io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 102io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 103io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 104io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 105io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 106io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 107io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 108 109echo 110echo Rebase and test again 111echo 112$QEMU_IMG rebase -b "$TEST_IMG.base_new" "$TEST_IMG" 113io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 114io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 115io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 116io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 117io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 118io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 119io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 120io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 121io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 122io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 123io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 124io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 125io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 126io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 127io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 128io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 129 130echo 131echo "=== Test rebase in a subdirectory of the working directory ===" 132echo 133 134# Clean up the old images beforehand so they do not interfere with 135# this test 136_cleanup 137 138mkdir "$TEST_DIR/subdir" 139 140# Relative to the overlay 141BASE_OLD_OREL="t.$IMGFMT.base_old" 142BASE_NEW_OREL="t.$IMGFMT.base_new" 143 144# Relative to $TEST_DIR (which is going to be our working directory) 145OVERLAY_WREL="subdir/t.$IMGFMT" 146 147BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL" 148BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL" 149OVERLAY="$TEST_DIR/$OVERLAY_WREL" 150 151# Test done here: 152# 153# Backing (old): 11 11 -- 11 154# Backing (new): -- 22 22 11 155# Overlay: -- -- -- -- 156# 157# Rebasing works, we have verified that above. Here, we just want to 158# see that rebasing is done for the correct target backing file. 159 160TEST_IMG=$BASE_OLD _make_test_img 1M 161TEST_IMG=$BASE_NEW _make_test_img 1M 162TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" 1M 163 164echo 165 166$QEMU_IO "$BASE_OLD" \ 167 -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 168 -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ 169 | _filter_qemu_io 170 171$QEMU_IO "$BASE_NEW" \ 172 -c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ 173 -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ 174 | _filter_qemu_io 175 176echo 177 178pushd "$TEST_DIR" >/dev/null 179$QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" "$OVERLAY_WREL" 180popd >/dev/null 181 182# Verify the backing path is correct 183TEST_IMG=$OVERLAY _img_info | grep '^backing file' 184 185echo 186 187# Verify the data is correct 188$QEMU_IO "$OVERLAY" \ 189 -c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 190 -c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 191 -c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 192 -c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ 193 | _filter_qemu_io 194 195echo 196 197# Verify that cluster #3 is not allocated (because it is the same in 198# $BASE_OLD and $BASE_NEW) 199$QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map 200 201 202# success, all done 203echo "*** done" 204rm -f $seq.full 205status=0 206