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#!/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 (c) 2022 by Lawrence Livermore National Security, LLC.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/redundancy/redundancy.kshlib
#
# DESCRIPTION:
# When sequentially resilvering a dRAID pool to a distributed spare
# silent damage to an online vdev in a replacing or spare mirror vdev
# is not expected to be repaired. Not only does the rebuild have no
# reason to suspect the silent damage but even if it did there's no
# checksum available to determine the correct copy and make the repair.
# However, the subsequent scrub should detect and repair any damage.
#
# STRATEGY:
# 1. Create block device files for the test draid pool
# 2. For each parity value [1..3]
# a. Create a draid pool
# b. Fill it with some directories/files
# c. Systematically damage and replace three devices by:
# - Overwrite the device
# - Replace the damaged vdev with a distributed spare
# - Scrub the pool and verify repair IO is issued
# d. Detach the distributed spares
# e. Scrub the pool and verify there was nothing to repair
# f. Destroy the draid pool
#
typeset -r devs=7
typeset -r dev_size_mb=512
typeset -a disks
prefetch_disable=$(get_tunable PREFETCH_DISABLE)
rebuild_scrub_enabled=$(get_tunable REBUILD_SCRUB_ENABLED)
function cleanup
{
poolexists "$TESTPOOL" && destroy_pool "$TESTPOOL"
for i in {0..$devs}; do
rm -f "$TEST_BASE_DIR/dev-$i"
done
set_tunable32 PREFETCH_DISABLE $prefetch_disable
set_tunable32 REBUILD_SCRUB_ENABLED $rebuild_scrub_enabled
}
log_onexit cleanup
log_must set_tunable32 PREFETCH_DISABLE 1
log_must set_tunable32 REBUILD_SCRUB_ENABLED 0
# Disk files which will be used by pool
for i in {0..$(($devs - 1))}; do
device=$TEST_BASE_DIR/dev-$i
log_must truncate -s ${dev_size_mb}M $device
disks[${#disks[*]}+1]=$device
done
# Disk file which will be attached
log_must truncate -s 512M $TEST_BASE_DIR/dev-$devs
dir=$TEST_BASE_DIR
for nparity in 1 2 3; do
raid=draid${nparity}:3s
log_must zpool create -f -O compression=off -o cachefile=none \
$TESTPOOL $raid ${disks[@]}
# log_must zfs set primarycache=metadata $TESTPOOL
log_must zfs create $TESTPOOL/fs
log_must fill_fs /$TESTPOOL/fs 1 256 10 1024 R
log_must zfs create -o compress=on $TESTPOOL/fs2
log_must fill_fs /$TESTPOOL/fs2 1 256 10 1024 R
log_must zfs create -o compress=on -o recordsize=8k $TESTPOOL/fs3
log_must fill_fs /$TESTPOOL/fs3 1 256 10 1024 R
log_must zpool export $TESTPOOL
log_must zpool import -o cachefile=none -d $dir $TESTPOOL
log_must check_pool_status $TESTPOOL "errors" "No known data errors"
for nspare in 0 1 2; do
damaged=$dir/dev-${nspare}
spare=draid${nparity}-0-${nspare}
log_must zpool export $TESTPOOL
log_must dd conv=notrunc if=/dev/zero of=$damaged \
bs=1M seek=4 count=$(($dev_size_mb-4))
log_must zpool import -o cachefile=none -d $dir $TESTPOOL
log_must zpool replace -fsw $TESTPOOL $damaged $spare
# Scrub the pool after the sequential resilver and verify
# that the silent damage was repaired by the scrub.
log_must zpool scrub -w $TESTPOOL
log_must zpool status $TESTPOOL
log_must check_pool_status $TESTPOOL "errors" \
"No known data errors"
log_must check_pool_status $TESTPOOL "scan" "with 0 errors"
log_mustnot check_pool_status $TESTPOOL "scan" "repaired 0B"
done
for nspare in 0 1 2; do
log_must check_vdev_state $TESTPOOL \
spare-${nspare} "ONLINE"
log_must check_vdev_state $TESTPOOL \
${dir}/dev-${nspare} "ONLINE"
log_must check_vdev_state $TESTPOOL \
draid${nparity}-0-${nspare} "ONLINE"
done
# Detach the distributed spares and scrub the pool again to
# verify no damage remained on the originally corrupted vdevs.
for nspare in 0 1 2; do
log_must zpool detach $TESTPOOL draid${nparity}-0-${nspare}
done
log_must zpool clear $TESTPOOL
log_must zpool scrub -w $TESTPOOL
log_must zpool status $TESTPOOL
log_must check_pool_status $TESTPOOL "errors" "No known data errors"
log_must check_pool_status $TESTPOOL "scan" "with 0 errors"
log_must check_pool_status $TESTPOOL "scan" "repaired 0B"
log_must zpool destroy "$TESTPOOL"
done
log_pass "draid damaged device scrub test succeeded."
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