1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# This file and its contents are supplied under the terms of the
6# Common Development and Distribution License ("CDDL"), version 1.0.
7# You may only use this file in accordance with the terms of version
8# 1.0 of the CDDL.
9#
10# A full copy of the text of the CDDL should have accompanied this
11# source.  A copy of the CDDL is also available via the Internet at
12# http://www.illumos.org/license/CDDL.
13#
14# CDDL HEADER END
15#
16
17#
18# Copyright 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
19#
20
21. $STF_SUITE/include/libtest.shlib
22
23#
24# DESCRIPTION:
25# Deeply nested clones can be created and destroyed successfully
26#
27# STRATEGY:
28# 1. Create a deeply nested chain of clones
29# 2. Verify we can promote and destroy datasets in the chain without issues
30# NOTE:
31# Ported from scripts used to reproduce issue #3959 and #7279
32#
33
34verify_runnable "both"
35
36function cleanup
37{
38	destroy_dataset "$clonesfs" "-rRf"
39}
40log_onexit cleanup
41
42log_assert "Deeply nested clones should be created and destroyed without issues"
43
44snapname='snap'
45snaprename='temporary-snap'
46clonesfs="$TESTPOOL/$TESTFS1"
47
48# NOTE: set mountpoint=none to avoid mount/umount calls and speed up the process
49log_must zfs create -o mountpoint=none $clonesfs
50log_must zfs create $clonesfs/0
51dsname="$clonesfs/0@$snapname"
52log_must zfs snapshot $dsname
53
54# 1. Create a deeply nested chain of clones
55for c in {1..250}; do
56	log_must zfs clone $dsname $clonesfs/$c
57	dsname="$clonesfs/$c@$snapname"
58	log_must zfs snapshot $dsname
59done
60
61# 2. Verify we can promote and destroy datasets in the chain without issues
62for c in {0..249}; do
63	log_must zfs rename $clonesfs/$c@$snapname $clonesfs/$c@$snaprename
64	log_must zfs promote $clonesfs/$((c+1))
65	log_must zfs destroy -r $clonesfs/$c
66	log_must zfs destroy $clonesfs/$((c+1))@$snaprename
67done
68
69log_pass "Deeply nested clones can be created and destroyed successfully"
70