1#!/usr/bin/env bash
2# group: rw auto quick
3#
4# Test that sub-cluster allocating writes zero the rest of the cluster
5#
6# Copyright (C) 2010 IBM, Corp.
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=stefanha@linux.vnet.ibm.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}
34trap "_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 vmdk qcow qcow2 qed
41_supported_proto generic
42_unsupported_imgopts "subformat=streamOptimized"
43
44
45size=128M
46cluster_size=65536
47subcluster_offset=1024
48subcluster_size=2048
49_make_test_img $size
50
51# This first write causes an L2 table to be allocated so that the next write
52# doesn't need to allocate one and is therefore at the end of the image file.
53# Otherwise an L2 table could get in the way after the data cluster.
54echo
55echo "== writing first cluster to populate metadata =="
56$QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io
57
58echo
59echo "== writing at sub-cluster granularity =="
60$QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
61
62echo
63echo "== verify pattern =="
64$QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
65
66echo
67echo "== verify zeroes before sub-cluster pattern =="
68$QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io
69
70echo
71echo "== verify zeroes after sub-cluster pattern =="
72$QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io
73
74# success, all done
75echo "*** done"
76rm -f $seq.full
77status=0
78