diff options
Diffstat (limited to 'tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh')
| -rwxr-xr-x | tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh new file mode 100755 index 000000000000..447fbb36b412 --- /dev/null +++ b/tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh @@ -0,0 +1,77 @@ +#!/bin/ksh -p + +# +# This file and its contents are supplied under the terms of the +# Common Development and Distribution License ("CDDL"), version 1.0. +# You may only use this file in accordance with the terms of version +# 1.0 of the CDDL. +# +# A full copy of the text of the CDDL should have accompanied this +# source. A copy of the CDDL is also available via the Internet at +# http://www.illumos.org/license/CDDL. +# + +# +# Copyright (c) 2017 by Delphix. All rights reserved. +# + +. $STF_SUITE/include/libtest.shlib + +# +# DESCRIPTION: +# When a snapshot is destroyed, we used to recurse all clones +# that are downstream of the destroyed snapshot (e.g. to remove +# its key and merge its deadlist entries to the previous one). +# This recursion would break the stack on deeply nested clone +# hierarchies. To avoid this problem today, we keep heap-allocated +# records of all the clones as we traverse their hierarchy. +# +# This test ensures and showcases that our new method works with +# deeply nested clone hierarchies. +# +# STRATEGY: +# 1. Create an fs and take a snapshot of it (snapshot foo) +# 2. Take a second snapshot of the same fs (snapshot bar) on +# top of snapshot foo +# 3. Create a clone of snapshot bar and then take a snapshot +# of it. +# 4. Create a clone of the newly-created snapshot and then +# take a snapshot of it. +# 5. Repeat step [4] many times to create a deeply nested hierarchy. +# 6. Destroy snapshot foo. +# + +verify_runnable "both" + +typeset FS0=$TESTPOOL/0 +typeset FOO=foo +typeset BAR=BAR + +typeset FS0SNAPFOO=$FS0@$FOO +typeset FS0SNAPBAR=$FS0@$BAR + +typeset -i numds=300 + +log_must zfs create $FS0 + +function test_cleanup +{ + log_must zfs destroy -Rf $FS0 + + return 0 +} + +log_must zfs snapshot $FS0SNAPFOO +log_must zfs snapshot $FS0SNAPBAR + +log_onexit test_cleanup + +for (( i=1; i<numds; i++ )); do + log_must zfs clone $TESTPOOL/$((i-1))@$BAR $TESTPOOL/$i + log_must zfs snapshot $TESTPOOL/$i@$BAR +done + +log_must zfs destroy $FS0SNAPFOO + +log_pass "Snapshot deletion doesn't break the stack in deeply nested " \ + "clone hierarchies." |