1#!/usr/bin/env bash 2# group: rw auto quick 3# 4# General test case for qcow2's image check 5# 6# Copyright (C) 2015 Red Hat, Inc. 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=mreitz@redhat.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# This tests qcow2-specific low-level functionality 41_supported_fmt qcow2 42_supported_proto file fuse 43_supported_os Linux 44# With an external data file, data clusters are not refcounted 45# (so qemu-img check would not do much); 46# we want to modify the refcounts, so we need them to have a specific 47# format (namely u16) 48_unsupported_imgopts data_file 'refcount_bits=\([^1]\|.\([^6]\|$\)\)' 49 50echo 51echo '=== Check on an image with a multiple of 2^32 clusters ===' 52echo 53 54_make_test_img -o "cluster_size=512" 512 55 56# Allocate L2 table 57$QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io 58 59# Put the data cluster at a multiple of 2 TB, resulting in the image apparently 60# having a multiple of 2^32 clusters 61# (To be more specific: It is at 32 PB) 62poke_file "$TEST_IMG" $((2048 + 8)) "\x00\x80\x00\x00\x00\x00\x00\x00" 63 64# An offset of 32 PB results in qemu-img check having to allocate an in-memory 65# refcount table of 128 TB (16 bit refcounts, 512 byte clusters), if qemu-img 66# don't check that referenced data cluster is far beyond the end of file. 67# But starting from 4.0, qemu-img does this check, and instead of "Cannot 68# allocate memory", we have an error showing that l2 entry is invalid. 69_check_test_img 70 71echo 72echo '=== Check leaks-fixed/corruptions-fixed report' 73echo 74 75# After leaks and corruptions were fixed, those numbers should be 76# reported by qemu-img check 77_make_test_img 64k 78 79# Allocate data cluster 80$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io 81 82reftable_ofs=$(peek_file_be "$TEST_IMG" 48 8) 83refblock_ofs=$(peek_file_be "$TEST_IMG" $reftable_ofs 8) 84 85# Introduce a leak: Make the image header's refcount 2 86poke_file_be "$TEST_IMG" "$refblock_ofs" 2 2 87 88l1_ofs=$(peek_file_be "$TEST_IMG" 40 8) 89 90# Introduce a corruption: Drop the COPIED flag from the (first) L1 entry 91l1_entry=$(peek_file_be "$TEST_IMG" $l1_ofs 8) 92l1_entry=$((l1_entry & ~(1 << 63))) 93poke_file_be "$TEST_IMG" $l1_ofs 8 $l1_entry 94 95echo 96# Should print the number of corruptions and leaks fixed 97# (Filter out all JSON fields (recognizable by their four-space 98# indentation), but keep the "-fixed" fields (by removing two spaces 99# from their indentation)) 100# (Also filter out the L1 entry, because why not) 101_check_test_img -r all --output=json \ 102 | sed -e 's/^ \(.*\)-fixed"/\1-fixed"/' \ 103 -e '/^ /d' \ 104 -e "s/\\([^0-9a-f]\\)$(printf %x $l1_entry)\\([^0-9a-f]\\)/\1L1_ENTRY_VALUE\2/" 105 106# success, all done 107echo "*** done" 108rm -f $seq.full 109status=0 110