1#! /bin/ksh -p 2# 3# CDDL HEADER START 4# 5# This file and its contents are supplied under the terms of the 6# Common Development and Distribution License ("CDDL"), version 1.0. 7# You may only use this file in accordance with the terms of version 8# 1.0 of the CDDL. 9# 10# A full copy of the text of the CDDL should have accompanied this 11# source. A copy of the CDDL is also available via the Internet at 12# http://www.illumos.org/license/CDDL. 13# 14# CDDL HEADER END 15# 16 17# 18# Copyright (c) 2015, 2016 by Delphix. All rights reserved. 19# 20 21. $STF_SUITE/include/libtest.shlib 22. $STF_SUITE/tests/functional/removal/removal.kshlib 23 24default_setup_noexit "$DISKS" 25 26 27function cleanup 28{ 29 log_must set_min_bytes 131072 30 default_cleanup_noexit 31} 32 33log_onexit cleanup 34 35log_must set_min_bytes 1 36 37log_must zfs set recordsize=512 $TESTPOOL/$TESTFS 38 39# 40# Create a large file so that we know some of the blocks will be on the 41# removed device, and hence eligible for remapping. 42# 43log_must dd if=/dev/urandom of=$TESTDIR/file bs=$((2**12)) count=$((2**9)) 44 45# 46# Randomly rewrite some of blocks in the file so that there will be holes and 47# we will not be able to remap the entire file in a few huge chunks. 48# 49for i in $(seq $((2**12))); do 50 # 51 # We have to sync periodically so that all the writes don't end up in 52 # the same txg. If they were all in the same txg, only the last write 53 # would go through and we would not have as many allocations to 54 # fragment the file. 55 # 56 ((i % 100 > 0 )) || sync || log_fail "Could not sync." 57 random_write $TESTDIR/file $((2**9)) || \ 58 log_fail "Could not random write." 59done 60 61# 62# Remap should quietly succeed as a noop before a removal. 63# 64log_must zfs remap $TESTPOOL/$TESTFS 65remaptxg_before=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS) 66(( $? == 0 )) || log_fail "Could not get remaptxg." 67[[ $remaptxg_before == "-" ]] || \ 68 log_fail "remaptxg ($remaptxg_before) had value before a removal" 69 70log_must zpool remove $TESTPOOL $REMOVEDISK 71log_must wait_for_removal $TESTPOOL 72log_mustnot vdevs_in_pool $TESTPOOL $REMOVEDISK 73 74# 75# remaptxg should not be set if we haven't done a remap. 76# 77remaptxg_before=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS) 78(( $? == 0 )) || log_fail "Could not get remaptxg." 79[[ $remaptxg_before == "-" ]] || \ 80 log_fail "remaptxg ($remaptxg_before) had value before a removal" 81 82mapping_size_before=$(indirect_vdev_mapping_size $TESTPOOL) 83log_must zfs remap $TESTPOOL/$TESTFS 84 85# Try to wait for a condense to finish. 86for i in {1..5}; do 87 sleep 5 88 sync 89done 90mapping_size_after=$(indirect_vdev_mapping_size $TESTPOOL) 91 92# 93# After the remap, there should not be very many blocks referenced. The reason 94# why our threshold is as high as 512 is because our ratio of metadata to 95# user data is relatively high, with only 64M of user data on the file system. 96# 97(( mapping_size_after < mapping_size_before )) || \ 98 log_fail "Mapping size did not decrease after remap: " \ 99 "$mapping_size_before before to $mapping_size_after after." 100(( mapping_size_after < 512 )) || \ 101 log_fail "Mapping size not small enough after remap: " \ 102 "$mapping_size_before before to $mapping_size_after after." 103 104# 105# After a remap, the remaptxg should be set to a non-zero value. 106# 107remaptxg_after=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS) 108(( $? == 0 )) || log_fail "Could not get remaptxg." 109log_note "remap txg after remap is $remaptxg_after" 110(( remaptxg_after > 0 )) || log_fail "remaptxg not increased" 111 112# 113# Remap should quietly succeed as a noop if there have been no removals since 114# the last remap. 115# 116log_must zfs remap $TESTPOOL/$TESTFS 117remaptxg_again=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS) 118(( $? == 0 )) || log_fail "Could not get remaptxg." 119log_note "remap txg after second remap is $remaptxg_again" 120(( remaptxg_again == remaptxg_after )) || \ 121 log_fail "remap not noop if there has been no removal" 122 123log_pass "Remapping a fs caused mapping size to decrease." 124