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]
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20# CDDL HEADER END
21#
22
23# $FreeBSD$
24
25#
26# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
27# Use is subject to license terms.
28#
29# ident	"@(#)reservation_009_pos.ksh	1.3	09/08/06 SMI"
30#
31
32. $STF_SUITE/include/libtest.kshlib
33. $STF_SUITE/tests/reservation/reservation.kshlib
34
35###############################################################################
36#
37# __stc_assertion_start
38#
39# ID: reservation_009_pos
40#
41# DESCRIPTION:
42#
43# In pool with a full filesystem and another filesystem with a reservation
44# setting the reservation on the second filesystem to 'none' should allow more
45# data to be written to the first filesystem.
46#
47#
48# STRATEGY:
49# 1) Create a filesystem as a dataset
50# 2) Create a filesystem at the same level
51# 3) Set a reservation on the dataset filesystem
52# 4) Fill up the filesystem
53# 5) Set the reservation on the dataset filesystem to 'none'
54# 6) Verify we can write more data to the first filesystem
55#
56# TESTABILITY: explicit
57#
58# TEST_AUTOMATION_LEVEL: automated
59#
60# CODING_STATUS: COMPLETED (2005-07-04)
61#
62# __stc_assertion_end
63#
64################################################################################
65
66verify_runnable "both"
67
68log_assert "Setting top level dataset reservation to 'none' allows more data to" \
69	" be written to top level filesystem"
70
71log_must $ZFS create $TESTPOOL/$TESTFS1
72
73space_avail=`get_prop available $TESTPOOL`
74
75#
76# To make sure this test doesn't take too long to execute on
77# large pools, we calculate a reservation setting which when
78# applied to the dataset will ensure we have RESV_FREE_SPACE
79# left free in the pool which we can quickly fill.
80#
81(( resv_size_set = space_avail - RESV_FREE_SPACE ))
82
83log_must $ZFS set reservation=$resv_size_set $TESTPOOL/$TESTFS1
84
85space_avail_still=`get_prop available $TESTPOOL`
86
87fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
88write_count=`expr $fill_size / $BLOCK_SIZE`
89
90# Now fill up the filesystem (which doesn't have a reservation set
91# and thus will use up whatever free space is left in the pool).
92$FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE \
93        -c $write_count -d 0
94ret=$?
95if (( $ret != $ENOSPC )); then
96	log_fail "Did not get ENOSPC as expected (got $ret)."
97fi
98
99log_must $ZFS set reservation=none $TESTPOOL/$TESTFS1
100
101log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE \
102        -c 1000 -d 0
103
104log_pass "Setting top level dataset reservation to 'none' allows more " \
105	"data to be written to the top level filesystem"
106