tests/file-io-error: New test
This is a regression test for https://bugzilla.redhat.com/show_bug.cgi?id=2234374. All this test needs to do is trigger an I/O error inside of file-posix (specifically raw_co_prw()). One reliable way to do this without requiring special privileges is to use a FUSE export, which allows us to inject any error that we want, e.g. via blkdebug. Signed-off-by: Hanna Czenczek <hreitz@redhat.com> Message-Id: <20230824155345.109765-6-hreitz@redhat.com> [hreitz: Fixed test to be skipped when there is no FUSE support, to suppress fusermount's allow_other warning, and to be skipped with $IMGOPTSSYNTAX enabled] Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
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Hanna Czenczek
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119
tests/qemu-iotests/tests/file-io-error
Executable file
119
tests/qemu-iotests/tests/file-io-error
Executable file
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#!/usr/bin/env bash
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# group: rw
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#
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# Produce an I/O error in file-posix, and hope that it is not catastrophic.
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# Regression test for: https://bugzilla.redhat.com/show_bug.cgi?id=2234374
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#
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# Copyright (C) 2023 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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seq=$(basename "$0")
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_qemu
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rm -f "$TEST_DIR/fuse-export"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ../common.rc
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. ../common.filter
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. ../common.qemu
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# Format-agnostic (we do not use any), but we do test the file protocol
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_supported_proto file
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_require_drivers blkdebug null-co
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if [ "$IMGOPTSSYNTAX" = "true" ]; then
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# We need `$QEMU_IO -f file` to work; IMGOPTSSYNTAX uses --image-opts,
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# breaking -f.
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_unsupported_fmt $IMGFMT
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fi
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# This is a regression test of a bug in which flie-posix would access zone
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# information in case of an I/O error even when there is no zone information,
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# resulting in a division by zero.
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# To reproduce the problem, we need to trigger an I/O error inside of
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# file-posix, which can be done (rootless) by providing a FUSE export that
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# presents only errors when accessed.
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_launch_qemu
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'qmp_capabilities'}" \
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'return'
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'blockdev-add',
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'arguments': {
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'driver': 'blkdebug',
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'node-name': 'node0',
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'inject-error': [{'event': 'none'}],
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'image': {
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'driver': 'null-co'
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}
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}}" \
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'return'
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# FUSE mountpoint must exist and be a regular file
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touch "$TEST_DIR/fuse-export"
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# The grep -v to filter fusermount's (benign) error when /etc/fuse.conf does
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# not contain user_allow_other and the subsequent check for missing FUSE support
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# have both been taken from iotest 308.
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output=$(_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'block-export-add',
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'arguments': {
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'id': 'exp0',
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'type': 'fuse',
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'node-name': 'node0',
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'mountpoint': '$TEST_DIR/fuse-export',
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'writable': true
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}}" \
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'return' \
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| grep -v 'option allow_other only allowed if')
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if echo "$output" | grep -q "Parameter 'type' does not accept value 'fuse'"; then
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_notrun 'No FUSE support'
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fi
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echo "$output"
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echo
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# This should fail, but gracefully, i.e. just print an I/O error, not crash.
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$QEMU_IO -f file -c 'write 0 64M' "$TEST_DIR/fuse-export" | _filter_qemu_io
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echo
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'block-export-del',
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'arguments': {'id': 'exp0'}}" \
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'return'
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_send_qemu_cmd $QEMU_HANDLE \
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'' \
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'BLOCK_EXPORT_DELETED'
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'blockdev-del',
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'arguments': {'node-name': 'node0'}}" \
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'return'
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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33
tests/qemu-iotests/tests/file-io-error.out
Normal file
33
tests/qemu-iotests/tests/file-io-error.out
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QA output created by file-io-error
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{'execute': 'qmp_capabilities'}
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{"return": {}}
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{'execute': 'blockdev-add',
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'arguments': {
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'driver': 'blkdebug',
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'node-name': 'node0',
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'inject-error': [{'event': 'none'}],
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'image': {
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'driver': 'null-co'
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}
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}}
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{"return": {}}
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{'execute': 'block-export-add',
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'arguments': {
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'id': 'exp0',
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'type': 'fuse',
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'node-name': 'node0',
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'mountpoint': 'TEST_DIR/fuse-export',
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'writable': true
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}}
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{"return": {}}
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write failed: Input/output error
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{'execute': 'block-export-del',
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'arguments': {'id': 'exp0'}}
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{"return": {}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "exp0"}}
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{'execute': 'blockdev-del',
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'arguments': {'node-name': 'node0'}}
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{"return": {}}
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*** done
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