mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
339f06a3bc
The previous commit removed the last usage of ${tmp} inside the tests
themselves; the only remaining users are sourced by check. So we can now
drop this variable from the tests.
Signed-off-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: Bo Tu <tubo@linux.vnet.ibm.com>
Message-id: 1460472980-26319-4-git-send-email-silbe@linux.vnet.ibm.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
94 lines
3.4 KiB
Bash
Executable file
94 lines
3.4 KiB
Bash
Executable file
#!/bin/bash
|
|
#
|
|
# Test case for non-self-referential qcow2 refcount blocks
|
|
#
|
|
# Copyright (C) 2014 Red Hat, Inc.
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
# creator
|
|
owner=mreitz@redhat.com
|
|
|
|
seq="$(basename $0)"
|
|
echo "QA output created by $seq"
|
|
|
|
here="$PWD"
|
|
status=1 # failure is the default!
|
|
|
|
_cleanup()
|
|
{
|
|
_cleanup_test_img
|
|
}
|
|
trap "_cleanup; exit \$status" 0 1 2 3 15
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common.rc
|
|
. ./common.filter
|
|
|
|
_supported_fmt qcow2
|
|
_supported_proto file
|
|
_supported_os Linux
|
|
# This test relies on refcounts being 64 bits wide (which does not work with
|
|
# compat=0.10)
|
|
_unsupported_imgopts 'refcount_bits=\([^6]\|.\([^4]\|$\)\)' 'compat=0.10'
|
|
|
|
echo
|
|
echo '=== Testing large refcount and L1 table ==='
|
|
echo
|
|
|
|
# Create an image with an L1 table and a refcount table that each span twice the
|
|
# number of clusters which can be described by a single refblock; therefore, at
|
|
# least two refblocks cannot count their own refcounts because all the clusters
|
|
# they describe are part of the L1 table or refcount table.
|
|
|
|
# One refblock can describe (with cluster_size=512 and refcount_bits=64)
|
|
# 512/8 = 64 clusters, therefore the L1 table should cover 128 clusters, which
|
|
# equals 128 * (512/8) = 8192 entries (actually, 8192 - 512/8 = 8129 would
|
|
# suffice, but it does not really matter). 8192 L2 tables can in turn describe
|
|
# 8192 * 512/8 = 524,288 clusters which cover a space of 256 MB.
|
|
|
|
# Since with refcount_bits=64 every refcount block entry is 64 bits wide (just
|
|
# like the L2 table entries), the same calculation applies to the refcount table
|
|
# as well; the difference is that while for the L1 table the guest disk size is
|
|
# concerned, for the refcount table it is the image length that has to be at
|
|
# least 256 MB. We can achieve that by using preallocation=metadata for an image
|
|
# which has a guest disk size of 256 MB.
|
|
|
|
IMGOPTS="$IMGOPTS,refcount_bits=64,cluster_size=512,preallocation=metadata" \
|
|
_make_test_img 256M
|
|
|
|
# We know for sure that the L1 and refcount tables do not overlap with any other
|
|
# structure because the metadata overlap checks would have caught that case.
|
|
|
|
# Because qemu refuses to open qcow2 files whose L1 table does not cover the
|
|
# whole guest disk size, it is definitely large enough. On the other hand, to
|
|
# test whether the refcount table is large enough, we simply have to verify that
|
|
# indeed all the clusters are allocated, which is done by qemu-img check.
|
|
|
|
# The final thing we need to test is whether the tables are actually covered by
|
|
# refcount blocks; since all clusters of the tables are referenced, we can use
|
|
# qemu-img check for that purpose, too.
|
|
|
|
$QEMU_IMG check "$TEST_IMG" | \
|
|
sed -e 's/^.* = \([0-9]\+\.[0-9]\+% allocated\).*\(clusters\)$/\1 \2/' \
|
|
-e '/^Image end offset/d'
|
|
|
|
# (Note that we cannot use _check_test_img because that function filters out the
|
|
# allocation status)
|
|
|
|
# success, all done
|
|
echo '*** done'
|
|
rm -f $seq.full
|
|
status=0
|