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1 #!/usr/bin/env bash 2 # group: rw quick 3 # 4 # Test the handling of errors in write requests with multiple allocations 5 # 6 # Copyright (C) 2020 Igalia, S.L. 7 # Author: Alberto Garcia <berto@igalia.com> 8 # 9 # This program is free software; you can redistribute it and/or modify 10 # it under the terms of the GNU General Public License as published by 11 # the Free Software Foundation; either version 2 of the License, or 12 # (at your option) any later version. 13 # 14 # This program is distributed in the hope that it will be useful, 15 # but WITHOUT ANY WARRANTY; without even the implied warranty of 16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 # GNU General Public License for more details. 18 # 19 # You should have received a copy of the GNU General Public License 20 # along with this program. If not, see <http://www.gnu.org/licenses/>. 21 # 22 23 # creator 24 owner=berto@igalia.com 25 26 seq=`basename $0` 27 echo "QA output created by $seq" 28 29 status=1 # failure is the default! 30 31 _cleanup() 32 { 33 _cleanup_test_img 34 } 35 trap "_cleanup; exit \$status" 0 1 2 3 15 36 37 # get standard environment, filters and checks 38 . ./common.rc 39 . ./common.filter 40 41 _supported_fmt qcow2 42 _supported_proto file fuse 43 _supported_os Linux 44 _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file 45 46 echo '### Create the image' 47 _make_test_img -o refcount_bits=64,cluster_size=1k 1M 48 49 # The reference counts of the clusters for the first 123k of this 50 # write request are stored in the first refcount block. The last 51 # cluster (guest offset 123k) is referenced in the second refcount 52 # block. 53 echo '### Fill the first refcount block and one data cluster from the second' 54 $QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io 55 56 echo '### Discard two of the last data clusters, leave one in the middle' 57 $QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io 58 $QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io 59 60 echo '### Corrupt the offset of the second refcount block' 61 refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8) 62 poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06" 63 64 # This tries to allocate the two clusters discarded earlier (guest 65 # offsets 121k and 123k). Their reference counts are in the first and 66 # second refcount blocks respectively, but only the first one can be 67 # allocated correctly because the second entry of the refcount table 68 # is corrupted. 69 echo '### Try to allocate the discarded clusters again' 70 $QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io 71 72 # success, all done 73 echo "*** done" 74 rm -f $seq.full 75 status=0