xref: /qemu/tests/qemu-iotests/106 (revision 834e8bf17c067bbc00e4034b10cec98eef363431)
1 #!/usr/bin/env bash
2 #
3 # Test preallocated resize of raw images
4 #
5 # Copyright (C) 2017 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 # creator
22 owner=mreitz@redhat.com
23 
24 seq=$(basename $0)
25 echo "QA output created by $seq"
26 
27 status=1	# failure is the default!
28 
29 _cleanup()
30 {
31 	_cleanup_test_img
32 }
33 trap "_cleanup; exit \$status" 0 1 2 3 15
34 
35 # get standard environment and filters
36 . ./common.rc
37 . ./common.filter
38 
39 _supported_fmt raw
40 _supported_proto file
41 _supported_os Linux
42 
43 # in kB
44 CREATION_SIZE=128
45 GROWTH_SIZE=256
46 
47 echo '=== Testing image growth ==='
48 
49 for create_mode in off falloc full; do
50     for growth_mode in off falloc full; do
51         echo
52         echo "--- create_mode=$create_mode growth_mode=$growth_mode ---"
53 
54         _make_test_img -o "preallocation=$create_mode" ${CREATION_SIZE}K
55         $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
56 
57         expected_size=0
58         if [ $create_mode != off ]; then
59             expected_size=$CREATION_SIZE
60         fi
61         if [ $growth_mode != off ]; then
62             expected_size=$((expected_size + $GROWTH_SIZE))
63         fi
64 
65         actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
66         actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
67 
68         # The actual size may exceed the expected size, depending on the file
69         # system. Therefore we just test that the actual size is at least what
70         # we expect.
71         if [ $actual_size -lt $expected_size ]; then
72             echo "ERROR: Image should have at least ${expected_size}K, but has ${actual_size}K"
73         fi
74     done
75 done
76 
77 echo
78 echo '=== Testing image shrinking ==='
79 
80 # None of this should work except for "off", because other modes cannot be used
81 # for shrinking
82 for growth_mode in falloc full off; do
83     echo
84     echo "--- growth_mode=$growth_mode ---"
85     $QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
86 done
87 
88 echo
89 echo '=== Testing image growth on 2G empty image ==='
90 
91 for growth_mode in falloc full; do
92     echo
93     echo "--- growth_mode=$growth_mode ---"
94 
95     # Maybe we want to do an lseek() to the end of the file before the
96     # preallocation; if the file has a length of 2 GB, that would
97     # return an integer that overflows to negative when put into a
98     # plain int.  We should use the correct type for the result, and
99     # this tests we do.
100 
101     _make_test_img 2G
102     $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
103 
104     actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
105     actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
106 
107     if [ $actual_size -lt $GROWTH_SIZE ]; then
108         echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
109     fi
110 done
111 
112 # success, all done
113 echo '*** done'
114 rm -f $seq.full
115 status=0
116