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 2007 Sun Microsystems, Inc.  All rights reserved.
27# Use is subject to license terms.
28#
29# ident	"@(#)reservation_016_pos.ksh	1.2	07/01/09 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_016_pos
40#
41# DESCRIPTION:
42#
43# In pool with a full filesystem and a regular volume (with implicit
44# reservation) destroying the volume should allow more data to be written
45# to the filesystem
46#
47#
48# STRATEGY:
49# 1) Create a regular (non-sparse) volume
50# 2) Create a filesystem at the same level
51# 3) Fill up the filesystem
52# 4) Destroy the volume
53# 5) Verify can write more data to the filesystem
54#
55# TESTABILITY: explicit
56#
57# TEST_AUTOMATION_LEVEL: automated
58#
59# CODING_STATUS: COMPLETED (2005-07-19)
60#
61# __stc_assertion_end
62#
63################################################################################
64
65verify_runnable "global"
66
67log_assert "Destroying a regular volume with reservation allows more data to" \
68	" be written to top level filesystem"
69
70space_avail=`get_prop available $TESTPOOL`
71
72#
73# To make sure this test doesn't take too long to execute on
74# large pools, we calculate a volume size which will ensure we
75# have RESV_FREE_SPACE left free in the pool.
76#
77(( vol_set_size = space_avail * 95 / 100 ))
78vol_set_size=$(floor_volsize $vol_set_size $BLOCK_SIZE)
79
80# Creating a regular volume implicitly sets its reservation
81# property to the same value.
82log_must $ZFS create -b $BLOCK_SIZE -V $vol_set_size $TESTPOOL/$TESTVOL
83
84space_avail_still=`get_prop available $TESTPOOL`
85
86# Create a secondary filesystem to soak up what's left to get
87# to RESV_FREE_SPACE for the pool.
88space_avail_still=`get_prop available $TESTPOOL`
89(( zfs_res = space_avail_still - RESV_FREE_SPACE ))
90log_must $ZFS create -o refreservation=$zfs_res $TESTPOOL/$TESTFS2
91
92space_avail_still=`get_prop available $TESTPOOL`
93
94fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
95write_count=`expr $fill_size / $BLOCK_SIZE`
96
97# Now fill up the filesystem (which doesn't have a reservation set
98# and thus will use up whatever free space is left in the pool).
99$FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE \
100        -c $write_count -d 0
101ret=$?
102if (( $ret != $ENOSPC )); then
103	log_fail "Did not get ENOSPC as expected (got $ret)."
104fi
105
106log_must $ZFS destroy -f $TESTPOOL/$TESTVOL
107
108log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE \
109        -c 1000 -d 0
110
111log_pass "Destroying volume with reservation allows more data to" \
112	" be written to top level filesystem"
113