2 # group: rw backing quick
4 # Test that backing files can be smaller than the image
6 # Copyright (C) 2010 IBM, Corp.
9 # Copyright (C) 2009 Red Hat, Inc.
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.
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.
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/>.
26 owner=stefanha@redhat.com
29 echo "QA output created by $seq"
31 status=1 # failure is the default!
36 _rm_test_img "${TEST_IMG}.copy"
39 trap "_cleanup; exit \$status" 0 1 2 3 15
41 # get standard environment, filters and checks
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
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=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 ))
58 # The base image is smaller than the image file
59 base_size=$(( image_size - 1024 * 1024 * 1024 ))
61 offset=$(( base_size - 32 * 1024 ))
63 TEST_IMG_SAVE="$TEST_IMG"
64 TEST_IMG="$TEST_IMG.base"
66 _make_test_img $base_size
68 echo "Filling base image"
71 # Fill end of base image with a pattern, skipping every other sector
72 io writev $offset 512 1024 32
76 echo "Creating test image with backing file"
79 TEST_IMG="$TEST_IMG_SAVE"
80 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size
82 echo "Filling test image"
85 # Write every other sector around where the base image ends
86 io writev $(( offset + 512 )) 512 1024 64
94 io readv $(( offset )) 512 1024 32
97 io readv $(( offset + 512 )) 512 1024 64
99 # Zero sectors beyond end of base image
100 io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
104 # Rebase it on top of its base image
105 $QEMU_IMG rebase -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG"
111 qemu_comm_method="monitor"
112 _launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},aio=${AIOMODE},id=disk
114 if [ "${VALGRIND_QEMU}" == "y" ]; then
120 TEST_IMG="$TEST_IMG.copy" _make_test_img $image_size
121 _send_qemu_cmd $h "drive_backup -n disk ${TEST_IMG}.copy" "(qemu)" \
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 $h 'quit' ""
129 TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32
132 TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64
134 # Zero sectors beyond end of base image
135 TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
141 echo '=== Reading across backing EOF in one operation ==='
144 # Use a cluster boundary as the base end here
145 base_size=$((3 * 1024 * 1024 * 1024))
147 TEST_IMG="$TEST_IMG.base" _make_test_img $base_size
148 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size
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" \
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" \