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11a82d14 | 1 | #!/usr/bin/env bash |
a62cbac4 HR |
2 | # |
3 | # Test case for copy-on-read into qcow2, using the COR filter driver | |
4 | # | |
5 | # Copyright (C) 2018 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 | seq="$(basename $0)" | |
22 | echo "QA output created by $seq" | |
23 | ||
a62cbac4 HR |
24 | status=1 # failure is the default! |
25 | ||
26 | # get standard environment, filters and checks | |
27 | . ./common.rc | |
28 | . ./common.filter | |
29 | ||
30 | TEST_WRAP="$TEST_DIR/t.wrap.qcow2" | |
31 | BLKDBG_CONF="$TEST_DIR/blkdebug.conf" | |
32 | ||
33 | # Sanity check: our use of blkdebug fails if $TEST_DIR contains spaces | |
34 | # or other problems | |
35 | case "$TEST_DIR" in | |
36 | *[^-_a-zA-Z0-9/]*) | |
37 | _notrun "Suspicious TEST_DIR='$TEST_DIR', cowardly refusing to run" ;; | |
38 | esac | |
39 | ||
40 | _cleanup() | |
41 | { | |
42 | _cleanup_test_img | |
43 | rm -f "$TEST_WRAP" | |
44 | rm -f "$BLKDBG_CONF" | |
45 | } | |
46 | trap "_cleanup; exit \$status" 0 1 2 3 15 | |
47 | ||
48 | # Test is supported for any backing file; but we force qcow2 for our wrapper. | |
49 | _supported_fmt generic | |
50 | _supported_proto generic | |
a62cbac4 HR |
51 | # LUKS support may be possible, but it complicates things. |
52 | _unsupported_fmt luks | |
325dd915 | 53 | _unsupported_imgopts "subformat=streamOptimized" |
a62cbac4 HR |
54 | |
55 | echo | |
56 | echo '=== Copy-on-read ===' | |
57 | echo | |
58 | ||
59 | # Prep the images | |
60 | # VPC rounds image sizes to a specific geometry, force a specific size. | |
61 | if [ "$IMGFMT" = "vpc" ]; then | |
62 | IMGOPTS=$(_optstr_add "$IMGOPTS" "force_size") | |
63 | fi | |
64 | _make_test_img 4G | |
65 | $QEMU_IO -c "write -P 55 3G 1k" "$TEST_IMG" | _filter_qemu_io | |
66 | IMGPROTO=file IMGFMT=qcow2 IMGOPTS= TEST_IMG_FILE="$TEST_WRAP" \ | |
67 | _make_test_img -F "$IMGFMT" -b "$TEST_IMG" | _filter_img_create | |
68 | $QEMU_IO -f qcow2 -c "write -z -u 1M 64k" "$TEST_WRAP" | _filter_qemu_io | |
69 | ||
70 | # Ensure that a read of two clusters, but where one is already allocated, | |
71 | # does not re-write the allocated cluster | |
72 | cat > "$BLKDBG_CONF" <<EOF | |
73 | [inject-error] | |
74 | event = "cor_write" | |
75 | sector = "2048" | |
76 | EOF | |
77 | $QEMU_IO -c "open \ | |
78 | -o driver=copy-on-read,file.driver=blkdebug,file.config=$BLKDBG_CONF,file.image.driver=qcow2 $TEST_WRAP" \ | |
79 | -c "read -P 0 1M 128k" | _filter_qemu_io | |
80 | ||
81 | # Read the areas we want copied. A zero-length read should still be a | |
82 | # no-op. The next read is under 2G, but aligned so that rounding to | |
83 | # clusters copies more than 2G of zeroes. The final read will pick up | |
84 | # the non-zero data in the same cluster. Since a 2G read may exhaust | |
85 | # memory on some machines (particularly 32-bit), we skip the test if | |
86 | # that fails due to memory pressure. | |
87 | $QEMU_IO \ | |
88 | -c "open -o driver=copy-on-read,file.driver=qcow2 $TEST_WRAP" \ | |
89 | -c "read 0 0" \ | |
90 | | _filter_qemu_io | |
91 | output=$($QEMU_IO \ | |
92 | -c "open -o driver=copy-on-read,file.driver=qcow2 $TEST_WRAP" \ | |
93 | -c "read -P 0 1k $((2*1024*1024*1024 - 512))" \ | |
94 | 2>&1 | _filter_qemu_io) | |
95 | case $output in | |
96 | *allocate*) | |
97 | _notrun "Insufficent memory to run test" ;; | |
98 | *) printf '%s\n' "$output" ;; | |
99 | esac | |
100 | $QEMU_IO \ | |
101 | -c "open -o driver=copy-on-read,file.driver=qcow2 $TEST_WRAP" \ | |
102 | -c "read -P 0 $((3*1024*1024*1024 + 1024)) 1k" \ | |
103 | | _filter_qemu_io | |
104 | ||
105 | # Copy-on-read is incompatible with read-only | |
106 | $QEMU_IO \ | |
107 | -c "open -r -o driver=copy-on-read,file.driver=qcow2 $TEST_WRAP" \ | |
108 | 2>&1 | _filter_testdir | |
109 | ||
110 | # Break the backing chain, and show that images are identical, and that | |
111 | # we properly copied over explicit zeros. | |
112 | $QEMU_IMG rebase -u -b "" -f qcow2 "$TEST_WRAP" | |
113 | $QEMU_IO -f qcow2 -c map "$TEST_WRAP" | |
114 | _check_test_img | |
115 | $QEMU_IMG compare -f $IMGFMT -F qcow2 "$TEST_IMG" "$TEST_WRAP" | |
116 | ||
117 | # success, all done | |
118 | echo '*** done' | |
119 | status=0 |