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) 2016 by Delphix. All rights reserved. 25# 26 27. $STF_SUITE/include/libtest.shlib 28 29# 30# DESCRIPTION: 31# zfs rename should work on existing datasets that exceed 32# zfs_max_dataset_nesting (our nesting limit) except in the 33# scenario that we try to rename it to something deeper 34# than it already is. 35# 36# STRATEGY: 37# 1. Create a set of ZFS datasets within our nesting limit. 38# 2. Try renaming one of them on top of the other so its 39# children pass the limit - it should fail. 40# 3. Increase the nesting limit. 41# 4. Check that renaming a dataset on top of the other 42# cannot exceed the new nesting limit but can exceed 43# the old one. 44# 5. Bring back the old nesting limit so you can simulate 45# the scenario of existing datasets that exceed our 46# nesting limit. 47# 6. Make sure that 'zfs rename' can work only if we are 48# trying to keep existing datasets that exceed the limit 49# at the same nesting level or less. Making it even 50# deeper should not work. 51# 52 53verify_runnable "both" 54 55dsA01="a" 56dsA02="a/a" 57dsA49=$(printf 'a/%.0s' {1..48})"a" 58 59dsB01="b" 60dsB49=$(printf 'b/%.0s' {1..48})"b" 61 62dsC01="c" 63dsC16=$(printf 'c/%.0s' {1..15})"c" 64 65dsB16A=$(printf 'b/%.0s' {1..16})"a" 66dsB15A=$(printf 'b/%.0s' {1..15})"a" 67 68dsB15A47A=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"a" 69dsB15A47C=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"c" 70 71dsB15A40B=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..40})"b" 72dsB15A47B=$(printf 'b/%.0s' {1..15})$(printf 'a/%.0s' {1..47})"b" 73 74function nesting_cleanup 75{ 76 log_must zfs destroy -fR $TESTPOOL/$dsA01 77 log_must zfs destroy -fR $TESTPOOL/$dsB01 78 log_must zfs destroy -fR $TESTPOOL/$dsC01 79 80 # If the test fails after increasing the limit and 81 # before resetting it, it will be left at the modified 82 # value for the remaining tests. That's the reason 83 # we reset it again here just in case. 84 mdb_set_uint32 zfs_max_dataset_nesting 50 85} 86 87log_onexit nesting_cleanup 88 89log_must zfs create -p $TESTPOOL/$dsA49 90log_must zfs create -p $TESTPOOL/$dsB49 91log_must zfs create -p $TESTPOOL/$dsC16 92 93log_mustnot zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB15A 94 95# extend limit 96mdb_set_uint32 zfs_max_dataset_nesting 64 97 98log_mustnot zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB16A 99log_must zfs rename $TESTPOOL/$dsA02 $TESTPOOL/$dsB15A 100 101# bring back old limit 102mdb_set_uint32 zfs_max_dataset_nesting 50 103 104log_mustnot zfs rename $TESTPOOL/$dsC01 $TESTPOOL/$dsB15A47C 105log_must zfs rename $TESTPOOL/$dsB15A47A $TESTPOOL/$dsB15A47B 106log_must zfs rename $TESTPOOL/$dsB15A47B $TESTPOOL/$dsB15A40B 107 108log_pass "Verify 'zfs rename' limits datasets so they don't pass " \ 109 "the nesting limit. For existing ones that do, it should " \ 110 "not allow them to grow anymore." 111