1#!/usr/local/bin/ksh93 -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# $FreeBSD$
24
25#
26# Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
27# Use is subject to license terms.
28#
29# ident	"@(#)zfs_snapshot_004_neg.ksh	1.2	08/05/14 SMI"
30#
31
32. $STF_SUITE/include/libtest.kshlib
33
34#################################################################################
35#
36# __stc_assertion_start
37#
38# ID: zfs_snapshot_004_neg
39#
40# DESCRIPTION:
41#	Verify recursive snapshotting could not break ZFS.
42#
43# STRATEGY:
44#	1. Create deeply-nested filesystems until it is too long to create snap
45#	2. Verify zfs snapshot -r pool@snap will not break ZFS
46#
47# TESTABILITY: explicit
48#
49# TEST_AUTOMATION_LEVEL: automated
50#
51# CODING_STATUS: COMPLETED (2007-08-08)
52#
53# __stc_assertion_end
54#
55################################################################################
56
57verify_runnable "both"
58
59function cleanup
60{
61	if datasetexists $initfs ; then
62		log_must $ZFS destroy -rf $initfs
63	fi
64}
65
66log_assert "Verify recursive snapshotting could not break ZFS."
67log_onexit cleanup
68
69initfs=$TESTPOOL/$TESTFS/$TESTFS
70basefs=$initfs
71typeset -i ret=0 len snaplen
72while ((ret == 0)); do
73	$ZFS create $basefs
74	$ZFS snapshot $basefs@snap1
75	ret=$?
76
77	len=$($ECHO $basefs| $WC -c)
78	if ((ret != 0)); then
79		log_note "The deeply-nested filesystem len: $len"
80		#
81		# Make sure there are at lease 2 characters left
82		# for snapshot name space, otherwise snapshot name
83		# is incorrect
84		#
85		if ((len >= 255)); then
86			if datasetexists $basefs; then
87				log_must $ZFS destroy -r $basefs
88			fi
89			basefs=${basefs%/*}
90			len=$($ECHO $basefs| $WC -c)
91		fi
92		break
93	else
94		log_note "ZFS snapshot suceeded.  len: $len"
95	fi
96
97	basefs=$basefs/$TESTFS
98done
99
100# Make snapshot name is longer than the max length
101((snaplen = 256 - len + 10))
102snap=$(gen_dataset_name $snaplen "s")
103log_mustnot $ZFS snapshot -r $TESTPOOL@$snap
104
105log_must datasetnonexists $TESTPOOL@$snap
106while [[ $basefs != $TESTPOOL ]]; do
107	log_must datasetnonexists $basefs@$snap
108	basefs=${basefs%/*}
109done
110
111log_pass "Verify recursive snapshotting could not break ZFS."
112