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#!/bin/ksh -p
#
# CDDL HEADER START
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#
# CDDL HEADER END
#
#
# Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
# Copyright 2019 Joyent, Inc.
#
# DESCRIPTION:
# Verify MMP behaves correctly when failing to write uberblocks.
#
# STRATEGY:
# 1. Create a mirrored pool and enable multihost
# 2. Inject a 50% failure rate when writing uberblocks to a device
# 3. Delay briefly for additional MMP writes to complete
# 4. Verify the failed uberblock writes did not prevent MMP updates
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/mmp/mmp.cfg
. $STF_SUITE/tests/functional/mmp/mmp.kshlib
verify_runnable "both"
function cleanup
{
zinject -c all
default_cleanup_noexit
log_must mmp_clear_hostid
}
log_assert "mmp behaves correctly when failing to write uberblocks."
log_onexit cleanup
log_must mmp_set_hostid $HOSTID1
default_mirror_setup_noexit $DISKS
log_must zpool set multihost=on $TESTPOOL
log_must zinject -d ${DISK[0]} -e io -T write -f 50 -L uber $TESTPOOL
clear_mmp_history
uber_count=$(count_mmp_writes $TESTPOOL 3)
if [ $uber_count -eq 0 ]; then
log_fail "mmp writes did not occur when uberblock IO errors injected"
fi
log_pass "mmp correctly wrote uberblocks when IO errors injected"
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