#!/usr/bin/env bash # # I/O errors when working with internal qcow2 snapshots, and repairing # the result # # Copyright (C) 2018 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/>. seq=$(basename $0) echo "QA output created by $seq" status=1 # failure is the default! _cleanup() { _cleanup_test_img rm -f "$TEST_DIR/blkdebug.conf" } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter # This test is specific to qcow2 _supported_fmt qcow2 _supported_proto file # This test needs clusters with at least a refcount of 2 so that # OFLAG_COPIED is not set. refcount_bits=1 is therefore unsupported. _unsupported_imgopts 'refcount_bits=1[^0-9]' echo echo '=== Simulating an I/O error during snapshot deletion ===' echo _make_test_img 64M $QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io # Create the snapshot $QEMU_IMG snapshot -c foo "$TEST_IMG" # Verify the snapshot is there echo _img_info | grep 'Snapshot list' echo '(Snapshot filtered)' echo # Try to delete the snapshot (with an error happening when freeing the # then leaked clusters) cat > "$TEST_DIR/blkdebug.conf" <<EOF [inject-error] event = "cluster_free" errno = "5" EOF $QEMU_IMG snapshot -d foo "blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG" # Verify the snapshot is gone echo _img_info | grep 'Snapshot list' # Should only show leaks echo '--- Checking test image ---' _check_test_img echo # As there are only leaks, this should be able to fully repair the # image echo '--- Repairing test image ---' _check_test_img -r leaks # success, all done echo '*** done' rm -f $seq.full status=0