028 (4144B)
1 #!/usr/bin/env bash 2 # group: rw backing quick 3 # 4 # Test that backing files can be smaller than the image 5 # 6 # Copyright (C) 2010 IBM, Corp. 7 # 8 # Based on 017: 9 # Copyright (C) 2009 Red Hat, Inc. 10 # 11 # This program is free software; you can redistribute it and/or modify 12 # it under the terms of the GNU General Public License as published by 13 # the Free Software Foundation; either version 2 of the License, or 14 # (at your option) any later version. 15 # 16 # This program is distributed in the hope that it will be useful, 17 # but WITHOUT ANY WARRANTY; without even the implied warranty of 18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 # GNU General Public License for more details. 20 # 21 # You should have received a copy of the GNU General Public License 22 # along with this program. If not, see <http://www.gnu.org/licenses/>. 23 # 24 25 # creator 26 owner=stefanha@redhat.com 27 28 seq=`basename $0` 29 echo "QA output created by $seq" 30 31 status=1 # failure is the default! 32 33 _cleanup() 34 { 35 _cleanup_qemu 36 _rm_test_img "${TEST_IMG}.copy" 37 _cleanup_test_img 38 } 39 trap "_cleanup; exit \$status" 0 1 2 3 15 40 41 # get standard environment, filters and checks 42 . ./common.rc 43 . ./common.filter 44 . ./common.pattern 45 . ./common.qemu 46 47 # Any format supporting backing files except vmdk and qcow which do not support 48 # smaller backing files. 49 _supported_fmt qcow2 qed 50 _supported_proto file fuse 51 _supported_os Linux 52 53 # Choose a size that is not necessarily a cluster size multiple for image 54 # formats that use clusters. This will ensure that the base image doesn't end 55 # precisely on a cluster boundary (the easy case). 56 image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 )) 57 58 # The base image is smaller than the image file 59 base_size=$(( image_size - 1024 * 1024 * 1024 )) 60 61 offset=$(( base_size - 32 * 1024 )) 62 63 TEST_IMG_SAVE="$TEST_IMG" 64 TEST_IMG="$TEST_IMG.base" 65 66 _make_test_img $base_size 67 68 echo "Filling base image" 69 echo 70 71 # Fill end of base image with a pattern, skipping every other sector 72 io writev $offset 512 1024 32 73 74 _check_test_img 75 76 echo "Creating test image with backing file" 77 echo 78 79 TEST_IMG="$TEST_IMG_SAVE" 80 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size 81 82 echo "Filling test image" 83 echo 84 85 # Write every other sector around where the base image ends 86 io writev $(( offset + 512 )) 512 1024 64 87 88 _check_test_img 89 90 echo "Reading" 91 echo 92 93 # Base image sectors 94 io readv $(( offset )) 512 1024 32 95 96 # Image sectors 97 io readv $(( offset + 512 )) 512 1024 64 98 99 # Zero sectors beyond end of base image 100 io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 101 102 _check_test_img 103 104 # Rebase it on top of its base image 105 $QEMU_IMG rebase -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG" 106 107 echo 108 echo block-backup 109 echo 110 111 qemu_comm_method="monitor" 112 _launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},aio=${AIOMODE},id=disk 113 h=$QEMU_HANDLE 114 if [ "${VALGRIND_QEMU}" == "y" ]; then 115 QEMU_COMM_TIMEOUT=7 116 else 117 QEMU_COMM_TIMEOUT=1 118 fi 119 120 TEST_IMG="$TEST_IMG.copy" _make_test_img $image_size 121 _send_qemu_cmd $h "drive_backup -n disk ${TEST_IMG}.copy" "(qemu)" \ 122 | _filter_imgfmt 123 124 silent=y qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs" 125 _send_qemu_cmd $h "info block-jobs" "No active jobs" 126 _send_qemu_cmd $h 'quit' "" 127 128 # Base image sectors 129 TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32 130 131 # Image sectors 132 TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64 133 134 # Zero sectors beyond end of base image 135 TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 136 137 138 _check_test_img 139 140 echo 141 echo '=== Reading across backing EOF in one operation ===' 142 echo 143 144 # Use a cluster boundary as the base end here 145 base_size=$((3 * 1024 * 1024 * 1024)) 146 147 TEST_IMG="$TEST_IMG.base" _make_test_img $base_size 148 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size 149 150 # Write 16 times 42 at the end of the base image 151 $QEMU_IO -c "write -P 42 $((base_size - 16)) 16" "$TEST_IMG.base" \ 152 | _filter_qemu_io 153 154 # Read 32 bytes across the base EOF from the top; 155 # should be 16 times 0x2a, then 16 times 0x00 156 $QEMU_IO -c "read -v $((base_size - 16)) 32" "$TEST_IMG" \ 157 | _filter_qemu_io 158 159 # success, all done 160 echo "*** done" 161 rm -f $seq.full 162 status=0