| #!/bin/ksh -p |
| # |
| # CDDL HEADER START |
| # |
| # The contents of this file are subject to the terms of the |
| # Common Development and Distribution License (the "License"). |
| # You may not use this file except in compliance with the License. |
| # |
| # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| # or http://www.opensolaris.org/os/licensing. |
| # See the License for the specific language governing permissions |
| # and limitations under the License. |
| # |
| # When distributing Covered Code, include this CDDL HEADER in each |
| # file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| # If applicable, add the following below this CDDL HEADER, with the |
| # fields enclosed by brackets "[]" replaced with your own identifying |
| # information: Portions Copyright [yyyy] [name of copyright owner] |
| # |
| # CDDL HEADER END |
| # |
| |
| # |
| # Copyright (c) 2016 by Delphix. All rights reserved. |
| # |
| |
| . $STF_SUITE/include/libtest.shlib |
| |
| # |
| # DESCRIPTION: |
| # zfs rename should work on existing datasets that exceed |
| # zfs_max_dataset_nesting (our nesting limit) except in the |
| # scenario that we try to rename it to something deeper |
| # than it already is. |
| # |
| # STRATEGY: |
| # 1. Create a set of ZFS datasets within our nesting limit. |
| # 2. Try renaming one of them on top of the other so its |
| # children pass the limit - it should fail. |
| # 3. Increase the nesting limit. |
| # 4. Check that renaming a dataset on top of the other |
| # cannot exceed the new nesting limit but can exceed |
| # the old one. |
| # 5. Bring back the old nesting limit so you can simulate |
| # the scenario of existing datasets that exceed our |
| # nesting limit. |
| # 6. Make sure that 'zfs rename' can work only if we are |
| # trying to keep existing datasets that exceed the limit |
| # at the same nesting level or less. Making it even |
| # deeper should not work. |
| # |
| |
| verify_runnable "both" |
| |
| dsA01="a" |
| dsA02="a/a" |
| dsA49=$(printf 'a/%.0s' {1..48})"a" |
| |
| dsB01="b" |
| dsB49=$(printf 'b/%.0s' {1..48})"b" |
| |
| dsC01="c" |
| dsC16=$(printf 'c/%.0s' {1..15})"c" |
| |
| dsB16A=$(printf 'b/%.0s' {1..16})"a" |
| dsB15A=$(printf 'b/%.0s' {1..15})"a" |
| |
| dsB15A47A=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"a" |
| dsB15A47C=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"c" |
| |
| dsB15A40B=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..40})"b" |
| dsB15A47B=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"b" |
| |
| function nesting_cleanup |
| { |
| log_must zfs destroy -fR $TESTPOOL/$dsA01 |
| log_must zfs destroy -fR $TESTPOOL/$dsB01 |
| log_must zfs destroy -fR $TESTPOOL/$dsC01 |
| |
| # If the test fails after increasing the limit and |
| # before resetting it, it will be left at the modified |
| # value for the remaining tests. That's the reason |
| # we reset it again here just in case. |
| log_must set_tunable_impl MAX_DATASET_NESTING 50 Z zcommon |
| } |
| |
| log_onexit nesting_cleanup |
| |
| log_must zfs create -p $TESTPOOL/$dsA49 |
| log_must zfs create -p $TESTPOOL/$dsB49 |
| log_must zfs create -p $TESTPOOL/$dsC16 |
| |
| log_mustnot zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB15A |
| |
| # extend limit |
| log_must set_tunable_impl MAX_DATASET_NESTING 64 Z zcommon |
| |
| log_mustnot zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB16A |
| log_must zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB15A |
| |
| # bring back old limit |
| log_must set_tunable_impl MAX_DATASET_NESTING 50 Z zcommon |
| |
| log_mustnot zfs rename $TESTPOOL/$dsC01 $TESTPOOL/$dsB15A47C |
| log_must zfs rename $TESTPOOL/$dsB15A47A $TESTPOOL/$dsB15A47B |
| log_must zfs rename $TESTPOOL/$dsB15A47B $TESTPOOL/$dsB15A40B |
| |
| log_pass "Verify 'zfs rename' limits datasets so they don't pass " \ |
| "the nesting limit. For existing ones that do, it should " \ |
| "not allow them to grow anymore." |