xref: /openbmc/qemu/tests/qemu-iotests/175 (revision 7d87775f)
1#!/usr/bin/env bash
2# group: quick
3#
4# Test creating raw image preallocation mode
5#
6# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com>
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
23owner=nirsof@gmail.com
24
25seq=`basename $0`
26echo "QA output created by $seq"
27
28status=1	# failure is the default!
29
30_cleanup()
31{
32    _cleanup_test_img
33    rm -f "$TEST_DIR/empty"
34}
35trap "_cleanup; exit \$status" 0 1 2 3 15
36
37# Some file systems sometimes allocate extra blocks independently of
38# the file size.  This function hides the resulting difference in the
39# stat -c '%b' output.
40# Parameter 1: Number of blocks an empty file occupies
41# Parameter 2: Minimal number of blocks in an image
42# Parameter 3: Image size in bytes
43_filter_blocks()
44{
45    extra_blocks=$1
46    min_blocks=$2
47    img_size=$3
48
49    sed -e "s/blocks=$min_blocks\\(\$\\|[^0-9]\\)/min allocation/" \
50        -e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/"
51}
52
53# Resize image using block_resize.
54# Parameter 1: image path
55# Parameter 2: new size
56_block_resize()
57{
58    local path=$1
59    local size=$2
60
61    $QEMU -qmp stdio -nographic -nodefaults \
62        -blockdev file,node-name=file,filename=$path,cache.direct=on \
63        <<EOF
64{'execute': 'qmp_capabilities'}
65{'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}}
66{'execute': 'quit'}
67EOF
68}
69
70# get standard environment, filters and checks
71. ./common.rc
72. ./common.filter
73
74_supported_fmt raw
75_supported_proto file fuse
76_supported_os Linux
77
78_default_cache_mode none
79_supported_cache_modes none directsync
80
81size=$((1 * 1024 * 1024))
82
83touch "$TEST_DIR/empty"
84extra_blocks=$(stat -c '%b' "$TEST_DIR/empty")
85
86# We always write the first byte; check how many blocks this filesystem
87# allocates to match empty image alloation.
88printf "\0" > "$TEST_DIR/empty"
89min_blocks=$(stat -c '%b' "$TEST_DIR/empty")
90
91echo
92echo "== creating image with default preallocation =="
93_make_test_img -o extent_size_hint=0 $size
94stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
95
96for mode in off full falloc; do
97    echo
98    echo "== creating image with preallocation $mode =="
99    _make_test_img -o preallocation=$mode,extent_size_hint=0 $size
100    stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
101done
102
103for new_size in 4096 1048576; do
104    echo
105    echo "== resize empty image with block_resize =="
106    _make_test_img -o extent_size_hint=0 0
107    _block_resize $TEST_IMG $new_size >/dev/null
108    stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size
109done
110
111# success, all done
112echo "*** done"
113rm -f $seq.full
114status=0
115