| 1 | #!/usr/bin/env bash |
| 2 | # group: rw auto quick |
| 3 | # |
| 4 | # Test aligned and misaligned write zeroes operations. |
| 5 | # |
| 6 | # Copyright (C) 2012 Red Hat, Inc. |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation; either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | # This program is distributed in the hope that it will be useful, |
| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | # GNU General Public License for more details. |
| 17 | # |
| 18 | # You should have received a copy of the GNU General Public License |
| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | # |
| 21 | |
| 22 | # creator |
| 23 | owner=pbonzini@redhat.com |
| 24 | |
| 25 | seq=`basename $0` |
| 26 | echo "QA output created by $seq" |
| 27 | |
| 28 | status=1 # failure is the default! |
| 29 | |
| 30 | _cleanup() |
| 31 | { |
| 32 | _cleanup_test_img |
| 33 | } |
| 34 | trap "_cleanup; exit \$status" 0 1 2 3 15 |
| 35 | |
| 36 | # get standard environment, filters and checks |
| 37 | . ./common.rc |
| 38 | . ./common.filter |
| 39 | |
| 40 | _supported_fmt generic |
| 41 | _supported_proto generic |
| 42 | _unsupported_imgopts "subformat=streamOptimized" |
| 43 | |
| 44 | |
| 45 | size=128M |
| 46 | _make_test_img $size |
| 47 | |
| 48 | do_test() |
| 49 | { |
| 50 | local align=$1 |
| 51 | local iocmd=$2 |
| 52 | local img=$3 |
| 53 | if [ "$IMGOPTSSYNTAX" = "true" ] |
| 54 | then |
| 55 | IO_OPEN_ARG="$img" |
| 56 | IO_EXTRA_ARGS="--image-opts" |
| 57 | else |
| 58 | IO_OPEN_ARG="-o driver=$IMGFMT,file.align=$align blkdebug::$img" |
| 59 | IO_EXTRA_ARGS="" |
| 60 | fi |
| 61 | { |
| 62 | echo "open $IO_OPEN_ARG" |
| 63 | echo $iocmd |
| 64 | } | $QEMU_IO $IO_EXTRA_ARGS |
| 65 | } |
| 66 | |
| 67 | echo |
| 68 | echo "=== Test aligned and misaligned write zeroes operations ===" |
| 69 | |
| 70 | for write_zero_cmd in "write -z" "aio_write -z"; do |
| 71 | for align in 512 4k; do |
| 72 | echo |
| 73 | echo "== preparing image ==" |
| 74 | do_test $align "write -P 0xa 0x200 0x400" "$TEST_IMG" | _filter_qemu_io |
| 75 | do_test $align "write -P 0xa 0x20000 0x600" "$TEST_IMG" | _filter_qemu_io |
| 76 | do_test $align "$write_zero_cmd 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io |
| 77 | |
| 78 | echo |
| 79 | echo "== verifying patterns (1) ==" |
| 80 | do_test $align "read -P 0xa 0x200 0x200" "$TEST_IMG" | _filter_qemu_io |
| 81 | do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io |
| 82 | do_test $align "read -P 0xa 0x20400 0x200" "$TEST_IMG" | _filter_qemu_io |
| 83 | |
| 84 | echo |
| 85 | echo "== rewriting zeroes ==" |
| 86 | do_test $align "write -P 0xb 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io |
| 87 | do_test $align "$write_zero_cmd 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io |
| 88 | |
| 89 | echo |
| 90 | echo "== verifying patterns (2) ==" |
| 91 | do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io |
| 92 | |
| 93 | echo |
| 94 | echo "== rewriting unaligned zeroes ==" |
| 95 | do_test $align "write -P 0xb 0x0 0x1000" "$TEST_IMG" | _filter_qemu_io |
| 96 | do_test $align "$write_zero_cmd 0x200 0x200" "$TEST_IMG" | _filter_qemu_io |
| 97 | |
| 98 | echo |
| 99 | echo "== verifying patterns (3) ==" |
| 100 | do_test $align "read -P 0xb 0x0 0x200" "$TEST_IMG" | _filter_qemu_io |
| 101 | do_test $align "read -P 0x0 0x200 0x200" "$TEST_IMG" | _filter_qemu_io |
| 102 | do_test $align "read -P 0xb 0x400 0xc00" "$TEST_IMG" | _filter_qemu_io |
| 103 | |
| 104 | echo |
| 105 | done |
| 106 | done |
| 107 | |
| 108 | _cleanup_test_img |
| 109 | |
| 110 | # Trigger truncate that would shrink qcow2 L1 table, which is done by |
| 111 | # clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes() |
| 112 | |
| 113 | echo |
| 114 | echo "=== Test misaligned write zeroes via truncate ===" |
| 115 | echo |
| 116 | |
| 117 | # any size will do, but the smaller the size the smaller the required image |
| 118 | CLUSTER_SIZE=$((4 * 1024)) |
| 119 | L2_COVERAGE=$(($CLUSTER_SIZE * $CLUSTER_SIZE / 8)) |
| 120 | _make_test_img $(($L2_COVERAGE * 2)) |
| 121 | |
| 122 | do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io |
| 123 | # next L2 table |
| 124 | do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io |
| 125 | |
| 126 | # only interested in qcow2 with file protocol here; also other formats |
| 127 | # might respond with "not supported" error message |
| 128 | if [ $IMGFMT = "qcow2" ] && [ $IMGPROTO = "file" ]; then |
| 129 | do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io |
| 130 | fi |
| 131 | |
| 132 | do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io |
| 133 | |
| 134 | # success, all done |
| 135 | echo |
| 136 | echo "*** done" |
| 137 | rm -f $seq.full |
| 138 | status=0 |