1#!/bin/ksh -p 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or https://opensource.org/licenses/CDDL-1.0. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22 23# 24# Copyright (c) 2013, 2016 by Delphix. All rights reserved. 25# 26 27. $STF_SUITE/include/libtest.shlib 28 29# 30# DESCRIPTION: 31# Exercise the traversal suspend/resume code in async_destroy by 32# destroying a file system that has more blocks than we can free 33# in a single txg. 34# 35# STRATEGY: 36# 1. Create a file system 37# 2. Set recordsize to 512 to create the maximum number of blocks 38# 3. Set compression to off to force zero-ed blocks to be written 39# 4. dd a lot of data from /dev/zero to the file system 40# 5. Destroy the file system 41# 6. Wait for the freeing property to go to 0 42# 7. Use zdb to check for leaked blocks 43# 44 45TEST_FS=$TESTPOOL/async_destroy 46 47verify_runnable "both" 48 49function cleanup 50{ 51 datasetexists $TEST_FS && destroy_dataset $TEST_FS 52 log_must set_tunable64 ASYNC_BLOCK_MAX_BLOCKS 100000 53} 54 55log_onexit cleanup 56log_assert "async_destroy can suspend and resume traversal" 57 58log_must zfs create -o recordsize=1k -o compression=off $TEST_FS 59 60# Fill with 128,000 blocks. 61log_must dd bs=1024k count=128 if=/dev/zero of=/$TEST_FS/file 62 63# 64# Decrease the max blocks to free each txg, so that freeing takes 65# long enough that we can observe it. 66# 67log_must set_tunable64 ASYNC_BLOCK_MAX_BLOCKS 100 68 69sync_all_pools 70log_must zfs destroy $TEST_FS 71 72# 73# We monitor the freeing property, to verify we can see blocks being 74# freed while the suspend/resume code is exercised. 75# 76t0=$SECONDS 77count=0 78while [[ $((SECONDS - t0)) -lt 10 ]]; do 79 [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]] && ((count++)) 80 [[ $count -gt 1 ]] && break 81 sleep 1 82done 83 84[[ $count -eq 0 ]] && log_fail "Freeing property remained empty" 85 86# 87# After a bit, go back to allowing an unlimited amount of freeing 88# per txg. 89# 90sleep 10 91log_must set_tunable64 ASYNC_BLOCK_MAX_BLOCKS 100000 92 93# Wait for everything to be freed. 94while [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]]; do 95 [[ $((SECONDS - t0)) -gt 180 ]] && \ 96 log_fail "Timed out waiting for freeing to drop to zero" 97done 98 99# Check for leaked blocks. 100log_must zdb -b $TESTPOOL 101 102log_pass "async_destroy can suspend and resume traversal" 103