diff options
| -rw-r--r-- | block/qcow2-cluster.c | 3 | ||||
| -rwxr-xr-x | tests/qemu-iotests/305 | 74 | ||||
| -rw-r--r-- | tests/qemu-iotests/305.out | 16 | ||||
| -rw-r--r-- | tests/qemu-iotests/group | 1 |
4 files changed, 91 insertions, 3 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 4530e5e471..f65ccc5840 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -1710,9 +1710,6 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, out: qcow2_cache_put(s->l2_table_cache, (void **) &l2_slice); - if (ret < 0 && *m && (*m)->nb_clusters > 0) { - QLIST_REMOVE(*m, next_in_flight); - } return ret; } diff --git a/tests/qemu-iotests/305 b/tests/qemu-iotests/305 new file mode 100755 index 0000000000..768818af4a --- /dev/null +++ b/tests/qemu-iotests/305 @@ -0,0 +1,74 @@ +#!/usr/bin/env bash +# +# Test the handling of errors in write requests with multiple allocations +# +# Copyright (C) 2020 Igalia, S.L. +# Author: Alberto Garcia <berto@igalia.com> +# +# 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=berto@igalia.com + +seq=`basename $0` +echo "QA output created by $seq" + +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux +_unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file + +echo '### Create the image' +_make_test_img -o refcount_bits=64,cluster_size=1k 1M + +# The reference counts of the clusters for the first 123k of this +# write request are stored in the first refcount block. The last +# cluster (guest offset 123k) is referenced in the second refcount +# block. +echo '### Fill the first refcount block and one data cluster from the second' +$QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io + +echo '### Discard two of the last data clusters, leave one in the middle' +$QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io + +echo '### Corrupt the offset of the second refcount block' +refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8) +poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06" + +# This tries to allocate the two clusters discarded earlier (guest +# offsets 121k and 123k). Their reference counts are in the first and +# second refcount blocks respectively, but only the first one can be +# allocated correctly because the second entry of the refcount table +# is corrupted. +echo '### Try to allocate the discarded clusters again' +$QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/305.out b/tests/qemu-iotests/305.out new file mode 100644 index 0000000000..538019e726 --- /dev/null +++ b/tests/qemu-iotests/305.out @@ -0,0 +1,16 @@ +QA output created by 305 +### Create the image +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 +### Fill the first refcount block and one data cluster from the second +wrote 126976/126976 bytes at offset 0 +124 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +### Discard two of the last data clusters, leave one in the middle +discard 1024/1024 bytes at offset 123904 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +discard 1024/1024 bytes at offset 125952 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +### Corrupt the offset of the second refcount block +### Try to allocate the discarded clusters again +qcow2: Marking image as corrupt: Refblock offset 0x20600 unaligned (reftable index: 0x1); further corruption events will be suppressed +write failed: Input/output error +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index 5cad015231..ff59cfd2d4 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -313,3 +313,4 @@ 302 quick 303 rw quick 304 rw quick +305 rw quick |