1#!/bin/ksh -p 2# SPDX-License-Identifier: CDDL-1.0 3 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 15# 16# Copyright (c) 2017, 2018 by Delphix. All rights reserved. 17# 18 19. $STF_SUITE/tests/functional/pool_checkpoint/pool_checkpoint.kshlib 20 21# 22# DESCRIPTION: 23# Discard checkpoint on a stressed pool. Ensure that we can 24# export and import the pool while discarding but not run any 25# operations that have to do with the checkpoint or change the 26# pool's config. 27# 28# STRATEGY: 29# 1. Import pools that's slightly fragmented 30# 2. Take checkpoint 31# 3. Do more random writes to "free" checkpointed blocks 32# 4. Start discarding checkpoint 33# 5. Export pool while discarding checkpoint 34# 6. Attempt to rewind (should fail) 35# 7. Import pool and ensure that discard is still running 36# 8. Attempt to run checkpoint commands, or commands that 37# change the pool's config (should fail) 38# 39 40verify_runnable "global" 41 42log_unsupported "Skipping, issue https://github.com/openzfs/zfs/issues/12053" 43 44function test_cleanup 45{ 46 # reset to original value 47 log_must restore_tunable SPA_DISCARD_MEMORY_LIMIT 48 cleanup_nested_pools 49} 50 51setup_nested_pool_state 52log_onexit test_cleanup 53 54# 55# Force discard to happen slower so it spans over 56# multiple txgs. 57# 58# Set memory limit to 128 bytes. Assuming that we 59# use 64-bit words for encoding space map entries, 60# ZFS will discard 8 non-debug entries per txg 61# (so at most 16 space map entries in debug-builds 62# due to debug entries). 63# 64# That should give us more than enough txgs to be 65# discarding the checkpoint for a long time as with 66# the current setup the checkpoint space maps should 67# have tens of thousands of entries. 68# 69# Note: If two-words entries are used in the space 70# map, we should have even more time to 71# verify this. 72# 73log_must save_tunable SPA_DISCARD_MEMORY_LIMIT 74set_tunable64 SPA_DISCARD_MEMORY_LIMIT 128 75 76log_must zpool checkpoint $NESTEDPOOL 77 78fragment_after_checkpoint_and_verify 79 80log_must zpool checkpoint -d $NESTEDPOOL 81 82log_must zpool export $NESTEDPOOL 83 84# 85# Verify on-disk state while pool is exported 86# 87log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL 88 89# 90# Attempt to rewind on a pool that is discarding 91# a checkpoint. 92# 93log_mustnot zpool import -d $FILEDISKDIR --rewind-to-checkpoint $NESTEDPOOL 94 95log_must zpool import -d $FILEDISKDIR $NESTEDPOOL 96 97# 98# Discarding should continue after import, so 99# all the following operations should fail. 100# 101log_mustnot zpool checkpoint $NESTEDPOOL 102log_mustnot zpool checkpoint -d $NESTEDPOOL 103log_mustnot zpool remove $NESTEDPOOL $FILEDISK1 104log_mustnot zpool reguid $NESTEDPOOL 105 106# reset to original value 107log_must restore_tunable SPA_DISCARD_MEMORY_LIMIT 108 109nested_wait_discard_finish 110 111log_must zpool export $NESTEDPOOL 112log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL 113 114log_pass "Can export/import but not rewind/checkpoint/discard or " \ 115 "change pool's config while discarding." 116