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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 23 owner=hreitz@redhat.com 24 25 seq="$(basename $0)" 26 echo "QA output created by $seq" 27 28 status=1 # failure is the default! 29 30 _cleanup() 31 { 32 _cleanup_test_img 33 } 34 trap "_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 50 echo 51 echo '=== Check on an image with a multiple of 2^32 clusters ===' 52 echo 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) 62 poke_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 71 echo 72 echo '=== Check leaks-fixed/corruptions-fixed report' 73 echo 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 82 reftable_ofs=$(peek_file_be "$TEST_IMG" 48 8) 83 refblock_ofs=$(peek_file_be "$TEST_IMG" $reftable_ofs 8) 84 85 # Introduce a leak: Make the image header's refcount 2 86 poke_file_be "$TEST_IMG" "$refblock_ofs" 2 2 87 88 l1_ofs=$(peek_file_be "$TEST_IMG" 40 8) 89 90 # Introduce a corruption: Drop the COPIED flag from the (first) L1 entry 91 l1_entry=$(peek_file_be "$TEST_IMG" $l1_ofs 8) 92 l1_entry=$((l1_entry & ~(1 << 63))) 93 poke_file_be "$TEST_IMG" $l1_ofs 8 $l1_entry 94 95 echo 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 107 echo "*** done" 108 rm -f $seq.full 109 status=0