#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or https://opensource.org/licenses/CDDL-1.0.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# Copyright (c) 2013 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/redundancy/redundancy.kshlib

#
# DESCRIPTION:
#	A mirrored pool can withstand N-1 device are failing or missing.
#
# STRATEGY:
#	1. Create N(>2,<5) virtual disk files.
#	2. Create mirror pool based on the virtual disk files.
#	3. Fill the filesystem with directories and files.
#	4. Record all the files and directories checksum information.
#	5. Damaged at most N-1 of the virtual disk files.
#	6. Verify the data are correct to prove mirror can withstand N-1 devices
#	   are failing.
#

verify_runnable "global"

log_assert "Verify mirrored pool can withstand N-1 devices are failing or missing."
log_onexit cleanup

typeset -i cnt=$(random_int_between 2 5)
setup_test_env $TESTPOOL mirror $cnt

typeset -i i=1

#
# Inject data corruption errors for mirrored pool
#
while (( i < cnt )); do
	damage_devs $TESTPOOL $i "label"
	log_must is_data_valid $TESTPOOL
	log_must clear_errors $TESTPOOL

	(( i +=1 ))
done

#
# Inject  bad devices errors for mirrored pool
#
i=1
while (( i < cnt )); do
        damage_devs $TESTPOOL $i
        log_must is_data_valid $TESTPOOL
	log_must recover_bad_missing_devs $TESTPOOL $i

	(( i +=1 ))
done

#
# Inject missing device errors for mirrored pool
#
i=1
while (( i < cnt )); do
        remove_devs $TESTPOOL $i
        log_must is_data_valid $TESTPOOL
	log_must recover_bad_missing_devs $TESTPOOL $i

	(( i +=1 ))
done

log_pass "Mirrored pool can withstand N-1 devices failing as expected."
