4 # Test aligned and misaligned write zeroes operations.
6 # Copyright (C) 2012 Red Hat, Inc.
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.
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.
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/>.
23 owner=pbonzini@redhat.com
26 echo "QA output created by $seq"
28 status=1 # failure is the default!
34 trap "_cleanup; exit \$status" 0 1 2 3 15
36 # get standard environment, filters and checks
40 _supported_fmt generic
41 _supported_proto generic
42 _unsupported_imgopts "subformat=streamOptimized"
53 if [ "$IMGOPTSSYNTAX" = "true" ]
56 IO_EXTRA_ARGS="--image-opts"
58 IO_OPEN_ARG="-o driver=$IMGFMT,file.align=$align blkdebug::$img"
62 echo "open $IO_OPEN_ARG"
64 } | $QEMU_IO $IO_EXTRA_ARGS
68 echo "=== Test aligned and misaligned write zeroes operations ==="
70 for write_zero_cmd in "write -z" "aio_write -z"; do
71 for align in 512 4k; do
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
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
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
90 echo "== verifying patterns (2) =="
91 do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io
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
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
110 # Trigger truncate that would shrink qcow2 L1 table, which is done by
111 # clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes()
114 echo "=== Test misaligned write zeroes via truncate ==="
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))
122 do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io
124 do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io
126 # only interested in qcow2 here; also other formats might respond with
127 # "not supported" error message
128 if [ $IMGFMT = "qcow2" ]; then
129 do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io
132 do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io