1#!/bin/ksh -p 2# SPDX-License-Identifier: CDDL-1.0 3# 4# CDDL HEADER START 5# 6# This file and its contents are supplied under the terms of the 7# Common Development and Distribution License ("CDDL"), version 1.0. 8# You may only use this file in accordance with the terms of version 9# 1.0 of the CDDL. 10# 11# A full copy of the text of the CDDL should have accompanied this 12# source. A copy of the CDDL is also available via the Internet at 13# http://www.illumos.org/license/CDDL. 14# 15# CDDL HEADER END 16# 17 18# 19# Copyright (c) 2020, George Amanakis. All rights reserved. 20# 21 22. $STF_SUITE/include/libtest.shlib 23. $STF_SUITE/tests/functional/l2arc/l2arc.cfg 24 25# 26# DESCRIPTION: 27# Off/onlining an L2ARC device results in rebuilding L2ARC, vdev present. 28# 29# STRATEGY: 30# 1. Create pool with a cache device. 31# 2. Create a random file in that pool and random read for 10 sec. 32# 3. Offline the L2ARC device. 33# 4. Read the amount of log blocks written from the header of the 34# L2ARC device. 35# 5. Online the L2ARC device. 36# 6. Read the amount of log blocks rebuilt in arcstats and compare to 37# (4). 38# 7. Check if the labels of the L2ARC device are intact. 39# 40 41verify_runnable "global" 42 43command -v fio > /dev/null || log_unsupported "fio missing" 44 45log_assert "Off/onlining an L2ARC device results in rebuilding L2ARC, vdev present." 46 47function cleanup 48{ 49 if poolexists $TESTPOOL ; then 50 destroy_pool $TESTPOOL 51 fi 52 53 log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch 54 log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE \ 55 $rebuild_blocks_min_l2size 56} 57log_onexit cleanup 58 59# L2ARC_NOPREFETCH is set to 0 to let L2ARC handle prefetches 60typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH) 61typeset rebuild_blocks_min_l2size=$(get_tunable L2ARC_REBUILD_BLOCKS_MIN_L2SIZE) 62log_must set_tunable32 L2ARC_NOPREFETCH 0 63log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE 0 64 65typeset fill_mb=800 66typeset cache_sz=$(( floor($fill_mb / 2) )) 67export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M 68 69log_must truncate -s ${cache_sz}M $VDEV_CACHE 70 71log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE 72 73log_must fio $FIO_SCRIPTS/mkfiles.fio 74log_must fio $FIO_SCRIPTS/random_reads.fio 75 76arcstat_quiescence_noecho l2_size 77log_must zpool offline $TESTPOOL $VDEV_CACHE 78arcstat_quiescence_noecho l2_size 79 80typeset l2_rebuild_log_blk_start=$(kstat arcstats.l2_rebuild_log_blks) 81typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | awk '/log_blk_count/ {print $2}') 82 83log_must zpool online $TESTPOOL $VDEV_CACHE 84arcstat_quiescence_noecho l2_size 85 86typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks) 87 88# Upon onlining the cache device we might write additional blocks to it 89# before it is marked for rebuild as the l2ad_* parameters are not cleared 90# when offlining the device. See comment in l2arc_rebuild_vdev(). 91# So we cannot compare the amount of rebuilt log blocks to the amount of log 92# blocks read from the header of the device. 93log_must test $(( $l2_rebuild_log_blk_end - \ 94 $l2_rebuild_log_blk_start )) -gt 0 95log_must test $l2_dh_log_blk -gt 0 96 97log_must zpool offline $TESTPOOL $VDEV_CACHE 98arcstat_quiescence_noecho l2_size 99 100log_must zdb -lq $VDEV_CACHE 101 102log_must zpool destroy -f $TESTPOOL 103 104log_pass "Off/onlining an L2ARC device results in rebuilding L2ARC, vdev present." 105