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 http://www.opensolaris.org/os/licensing. 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 set_max_blocks 50{ 51 echo "zfs_async_block_max_blocks/Z$1" | mdb -kw 52} 53 54function cleanup 55{ 56 datasetexists $TEST_FS && log_must zfs destroy $TEST_FS 57 log_must set_max_blocks ffffffffffffffff 58} 59 60log_onexit cleanup 61log_assert "async_destroy can suspend and resume traversal" 62 63log_must zfs create -o recordsize=1k -o compression=off $TEST_FS 64 65# Fill with 128,000 blocks. 66log_must dd bs=1024k count=128 if=/dev/zero of=/$TEST_FS/file 67 68# 69# Decrease the max blocks to free each txg, so that freeing takes 70# long enough that we can observe it. 71# 72log_must set_max_blocks 0t100 73 74log_must zfs destroy $TEST_FS 75 76# 77# We monitor the freeing property, to verify we can see blocks being 78# freed while the suspend/resume code is exercised. 79# 80t0=$SECONDS 81count=0 82while [[ $((SECONDS - t0)) -lt 10 ]]; do 83 [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]] && ((count++)) 84 [[ $count -gt 1 ]] && break 85 sleep 1 86done 87 88[[ $count -eq 0 ]] && log_fail "Freeing property remained empty" 89 90# 91# After a bit, go back to allowing an unlimited amount of freeing 92# per txg. 93# 94sleep 10 95log_must set_max_blocks ffffffffffffffff 96 97# Wait for everything to be freed. 98while [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]]; do 99 [[ $((SECONDS - t0)) -gt 180 ]] && \ 100 log_fail "Timed out waiting for freeing to drop to zero" 101done 102 103# Check for leaked blocks. 104log_must zdb -b $TESTPOOL 105 106log_pass "async_destroy can suspend and resume traversal" 107