| #!/bin/ksh -p |
| |
| # |
| # This file and its contents are supplied under the terms of the |
| # Common Development and Distribution License ("CDDL"), version 1.0. |
| # You may only use this file in accordance with the terms of version |
| # 1.0 of the CDDL. |
| # |
| # A full copy of the text of the CDDL should have accompanied this |
| # source. A copy of the CDDL is also available via the Internet at |
| # http://www.illumos.org/license/CDDL. |
| # |
| |
| # |
| # Copyright (c) 2017, 2018 by Delphix. All rights reserved. |
| # |
| |
| . $STF_SUITE/tests/functional/pool_checkpoint/pool_checkpoint.kshlib |
| |
| # |
| # DESCRIPTION: |
| # Discard checkpoint on a stressed pool. Ensure that we can |
| # export and import the pool while discarding but not run any |
| # operations that have to do with the checkpoint or change the |
| # pool's config. |
| # |
| # STRATEGY: |
| # 1. Import pools that's slightly fragmented |
| # 2. Take checkpoint |
| # 3. Do more random writes to "free" checkpointed blocks |
| # 4. Start discarding checkpoint |
| # 5. Export pool while discarding checkpoint |
| # 6. Attempt to rewind (should fail) |
| # 7. Import pool and ensure that discard is still running |
| # 8. Attempt to run checkpoint commands, or commands that |
| # change the pool's config (should fail) |
| # |
| |
| verify_runnable "global" |
| |
| function test_cleanup |
| { |
| # reset memory limit to 16M |
| set_tunable64 SPA_DISCARD_MEMORY_LIMIT 1000000 |
| cleanup_nested_pools |
| } |
| |
| setup_nested_pool_state |
| log_onexit test_cleanup |
| |
| # |
| # Force discard to happen slower so it spans over |
| # multiple txgs. |
| # |
| # Set memory limit to 128 bytes. Assuming that we |
| # use 64-bit words for encoding space map entries, |
| # ZFS will discard 8 non-debug entries per txg |
| # (so at most 16 space map entries in debug-builds |
| # due to debug entries). |
| # |
| # That should give us more than enough txgs to be |
| # discarding the checkpoint for a long time as with |
| # the current setup the checkpoint space maps should |
| # have tens of thousands of entries. |
| # |
| # Note: If two-words entries are used in the space |
| # map, we should have even more time to |
| # verify this. |
| # |
| set_tunable64 SPA_DISCARD_MEMORY_LIMIT 128 |
| |
| log_must zpool checkpoint $NESTEDPOOL |
| |
| fragment_after_checkpoint_and_verify |
| |
| log_must zpool checkpoint -d $NESTEDPOOL |
| |
| log_must zpool export $NESTEDPOOL |
| |
| # |
| # Verify on-disk state while pool is exported |
| # |
| log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL |
| |
| # |
| # Attempt to rewind on a pool that is discarding |
| # a checkpoint. |
| # |
| log_mustnot zpool import -d $FILEDISKDIR --rewind-to-checkpoint $NESTEDPOOL |
| |
| log_must zpool import -d $FILEDISKDIR $NESTEDPOOL |
| |
| # |
| # Discarding should continue after import, so |
| # all the following operations should fail. |
| # |
| log_mustnot zpool checkpoint $NESTEDPOOL |
| log_mustnot zpool checkpoint -d $NESTEDPOOL |
| log_mustnot zpool remove $NESTEDPOOL $FILEDISK1 |
| log_mustnot zpool reguid $NESTEDPOOL |
| |
| # reset memory limit to 16M |
| set_tunable64 SPA_DISCARD_MEMORY_LIMIT 16777216 |
| |
| nested_wait_discard_finish |
| |
| log_must zpool export $NESTEDPOOL |
| log_must zdb -e -p $FILEDISKDIR $NESTEDPOOL |
| |
| log_pass "Can export/import but not rewind/checkpoint/discard or " \ |
| "change pool's config while discarding." |