1#!/usr/bin/env bash
2#
3# Test creating raw image preallocation mode
4#
5# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com>
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# creator
22owner=nirsof@gmail.com
23
24seq=`basename $0`
25echo "QA output created by $seq"
26
27status=1	# failure is the default!
28
29_cleanup()
30{
31    _cleanup_test_img
32    rm -f "$TEST_DIR/empty"
33}
34trap "_cleanup; exit \$status" 0 1 2 3 15
35
36# Some file systems sometimes allocate extra blocks independently of
37# the file size.  This function hides the resulting difference in the
38# stat -c '%b' output.
39# Parameter 1: Number of blocks an empty file occupies
40# Parameter 2: Minimal number of blocks in an image
41# Parameter 3: Image size in bytes
42_filter_blocks()
43{
44    extra_blocks=$1
45    min_blocks=$2
46    img_size=$3
47
48    sed -e "s/blocks=$min_blocks\\(\$\\|[^0-9]\\)/min allocation/" \
49        -e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/"
50}
51
52# Resize image using block_resize.
53# Parameter 1: image path
54# Parameter 2: new size
55_block_resize()
56{
57    local path=$1
58    local size=$2
59
60    $QEMU -qmp stdio -nographic -nodefaults \
61        -blockdev file,node-name=file,filename=$path,cache.direct=on \
62        <<EOF
63{'execute': 'qmp_capabilities'}
64{'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}}
65{'execute': 'quit'}
66EOF
67}
68
69# get standard environment, filters and checks
70. ./common.rc
71. ./common.filter
72
73_supported_fmt raw
74_supported_proto file
75_supported_os Linux
76
77_default_cache_mode none
78_supported_cache_modes none directsync
79
80size=$((1 * 1024 * 1024))
81
82touch "$TEST_DIR/empty"
83extra_blocks=$(stat -c '%b' "$TEST_DIR/empty")
84
85# We always write the first byte; check how many blocks this filesystem
86# allocates to match empty image alloation.
87printf "\0" > "$TEST_DIR/empty"
88min_blocks=$(stat -c '%b' "$TEST_DIR/empty")
89
90echo
91echo "== creating image with default preallocation =="
92_make_test_img -o extent_size_hint=0 $size | _filter_imgfmt
93stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
94
95for mode in off full falloc; do
96    echo
97    echo "== creating image with preallocation $mode =="
98    _make_test_img -o preallocation=$mode,extent_size_hint=0 $size | _filter_imgfmt
99    stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size
100done
101
102for new_size in 4096 1048576; do
103    echo
104    echo "== resize empty image with block_resize =="
105    _make_test_img -o extent_size_hint=0 0 | _filter_imgfmt
106    _block_resize $TEST_IMG $new_size >/dev/null
107    stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size
108done
109
110# success, all done
111echo "*** done"
112rm -f $seq.full
113status=0
114