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Diffstat (limited to 'qemu/tests/qemu-iotests/121')
| -rwxr-xr-x | qemu/tests/qemu-iotests/121 | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/qemu/tests/qemu-iotests/121 b/qemu/tests/qemu-iotests/121 deleted file mode 100755 index 1307b4e32..000000000 --- a/qemu/tests/qemu-iotests/121 +++ /dev/null @@ -1,101 +0,0 @@ -#!/bin/bash -# -# Test cases for qcow2 refcount table growth -# -# Copyright (C) 2015 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 - -echo -echo '=== New refcount structures may not conflict with existing structures ===' - -echo -echo '--- Test 1 ---' -echo - -# Preallocation speeds up the write operation, but preallocating everything will -# destroy the purpose of the write; so preallocate one KB less than what would -# cause a reftable growth... -IMGOPTS='preallocation=metadata,cluster_size=1k' _make_test_img 64512K -# ...and make the image the desired size afterwards. -$QEMU_IMG resize "$TEST_IMG" 65M - -# The first write results in a growth of the refcount table during an allocation -# which has precisely the required size so that the new refcount block allocated -# in alloc_refcount_block() is right after cluster_index; this did lead to a -# different refcount block being written to disk (a zeroed cluster) than what is -# cached (a refblock with one entry having a refcount of 1), and the second -# write would then result in that cached cluster being marked dirty and then -# in it being written to disk. -# This should not happen, the new refcount structures may not conflict with -# new_block. -# (Note that for some reason, 'write 63M 1K' does not trigger the problem) -$QEMU_IO -c 'write 62M 1025K' -c 'write 64M 1M' "$TEST_IMG" | _filter_qemu_io - -_check_test_img - - -echo -echo '--- Test 2 ---' -echo - -IMGOPTS='preallocation=metadata,cluster_size=1k' _make_test_img 64513K -# This results in an L1 table growth which in turn results in some clusters at -# the start of the image becoming free -$QEMU_IMG resize "$TEST_IMG" 65M - -# This write results in a refcount table growth; but the refblock allocated -# immediately before that (new_block) takes cluster index 4 (which is now free) -# and is thus not self-describing (in contrast to test 1, where new_block was -# self-describing). The refcount table growth algorithm then used to place the -# new refcount structures at cluster index 65536 (which is the same as the -# cluster_index parameter in this case), allocating a new refcount block for -# that cluster while new_block already existed, leaking new_block. -# Therefore, the new refcount structures may not be put at cluster_index -# (because new_block already describes that cluster, and the new structures try -# to be self-describing). -$QEMU_IO -c 'write 63M 130K' "$TEST_IMG" | _filter_qemu_io - -_check_test_img - - -# success, all done -echo -echo '*** done' -rm -f $seq.full -status=0 |