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 2008 Sun Microsystems, Inc.  All rights reserved.
25# Use is subject to license terms.
26#
27
28#
29# Copyright (c) 2016 by Delphix. All rights reserved.
30#
31
32. $STF_SUITE/include/libtest.shlib
33
34#
35# DESCRIPTION:
36#	Long name filesystem with snapshot should not break ZFS.
37#
38# STRATEGY:
39#	1. Create filesystem and snapshot.
40#	2. When the snapshot length is 256, rename the filesystem.
41#	3. Verify it does not break ZFS
42#
43
44verify_runnable "both"
45
46function cleanup
47{
48	if datasetexists $initfs ; then
49		log_must zfs destroy -rf $initfs
50	fi
51}
52
53log_assert "Verify long name filesystem with snapshot should not break ZFS."
54log_onexit cleanup
55
56initfs=$TESTPOOL/$TESTFS/$TESTFS
57basefs=$initfs
58typeset -i ret=0 len snaplen
59while ((ret == 0)); do
60	zfs create $basefs
61	zfs snapshot $basefs@snap1
62	ret=$?
63
64	if ((ret != 0)); then
65		len=$(echo $basefs | wc -c)
66		log_note "The deeply-nested filesystem len: $len"
67
68		#
69		# Make sure there are at lease 2 characters left
70		# for snapshot name space, otherwise snapshot name
71		# is incorrect
72		#
73		if ((len >= 255)); then
74			if datasetexists $basefs; then
75				log_must zfs destroy -r $basefs
76			fi
77			basefs=${basefs%/*}
78			len=$(echo $basefs| wc -c)
79		fi
80		break
81	fi
82
83	basefs=$basefs/$TESTFS
84done
85
86# Make snapshot name length match the longest one
87((snaplen = 256 - len - 1)) # 1: @
88snap=$(gen_dataset_name $snaplen "s")
89log_must zfs snapshot $basefs@$snap
90
91log_mustnot zfs rename $basefs ${basefs}a
92log_mustnot zfs rename $basefs ${basefs}-new
93log_mustnot zfs rename $initfs ${initfs}-new
94log_mustnot zfs rename $TESTPOOL/$TESTFS $TESTPOOL/$TESTFS-new
95
96log_pass "Verify long name filesystem with snapshot should not break ZFS."
97