1#!/bin/ksh -p 2 3# 4# This file and its contents are supplied under the terms of the 5# Common Development and Distribution License ("CDDL"), version 1.0. 6# You may only use this file in accordance with the terms of version 7# 1.0 of the CDDL. 8# 9# A full copy of the text of the CDDL should have accompanied this 10# source. A copy of the CDDL is also available via the Internet at 11# http://www.illumos.org/license/CDDL. 12# 13 14# 15# Copyright (c) 2017, 2018 by Delphix. All rights reserved. 16# 17 18. $STF_SUITE/tests/functional/pool_checkpoint/pool_checkpoint.kshlib 19 20# 21# DESCRIPTION: 22# Discard checkpoint on a stressed pool. Ensure that we can 23# export and import the pool while discarding but not run any 24# operations that have to do with the checkpoint or change the 25# pool's config. 26# 27# STRATEGY: 28# 1. Import pools that's slightly fragmented 29# 2. Take checkpoint 30# 3. Do more random writes to "free" checkpointed blocks 31# 4. Start discarding checkpoint 32# 5. Export pool while discarding checkpoint 33# 6. Attempt to rewind (should fail) 34# 7. Import pool and ensure that discard is still running 35# 8. Attempt to run checkpoint commands, or commands that 36# change the pool's config (should fail) 37# 38 39verify_runnable "global" 40 41log_unsupported "Skipping, issue https://github.com/openzfs/zfs/issues/12053" 42 43function test_cleanup 44{ 45 # reset memory limit to 16M 46 set_tunable64 SPA_DISCARD_MEMORY_LIMIT 1000000 47 cleanup_nested_pools 48} 49 50setup_nested_pool_state 51log_onexit test_cleanup 52 53# 54# Force discard to happen slower so it spans over 55# multiple txgs. 56# 57# Set memory limit to 128 bytes. Assuming that we 58# use 64-bit words for encoding space map entries, 59# ZFS will discard 8 non-debug entries per txg 60# (so at most 16 space map entries in debug-builds 61# due to debug entries). 62# 63# That should give us more than enough txgs to be 64# discarding the checkpoint for a long time as with 65# the current setup the checkpoint space maps should 66# have tens of thousands of entries. 67# 68# Note: If two-words entries are used in the space 69# map, we should have even more time to 70# verify this. 71# 72set_tunable64 SPA_DISCARD_MEMORY_LIMIT 128 73 74log_must zpool checkpoint $NESTEDPOOL 75 76fragment_after_checkpoint_and_verify 77 78log_must zpool checkpoint -d $NESTEDPOOL 79 80log_must zpool export $NESTEDPOOL 81 82# 83# Verify on-disk state while pool is exported 84# 85log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL 86 87# 88# Attempt to rewind on a pool that is discarding 89# a checkpoint. 90# 91log_mustnot zpool import -d $FILEDISKDIR --rewind-to-checkpoint $NESTEDPOOL 92 93log_must zpool import -d $FILEDISKDIR $NESTEDPOOL 94 95# 96# Discarding should continue after import, so 97# all the following operations should fail. 98# 99log_mustnot zpool checkpoint $NESTEDPOOL 100log_mustnot zpool checkpoint -d $NESTEDPOOL 101log_mustnot zpool remove $NESTEDPOOL $FILEDISK1 102log_mustnot zpool reguid $NESTEDPOOL 103 104# reset memory limit to 16M 105set_tunable64 SPA_DISCARD_MEMORY_LIMIT 16777216 106 107nested_wait_discard_finish 108 109log_must zpool export $NESTEDPOOL 110log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL 111 112log_pass "Can export/import but not rewind/checkpoint/discard or " \ 113 "change pool's config while discarding." 114