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#
24# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25# Use is subject to license terms.
26
27. $STF_SUITE/include/libtest.kshlib
28. $STF_SUITE/tests/reservation/reservation.kshlib
29
30###############################################################################
31#
32# __stc_assertion_start
33#
34# ID: reservation_016_pos
35#
36# DESCRIPTION:
37#
38# In pool with a full filesystem and a regular volume (with implicit
39# reservation) destroying the volume should allow more data to be written
40# to the filesystem
41#
42#
43# STRATEGY:
44# 1) Create a regular (non-sparse) volume
45# 2) Create a filesystem at the same level
46# 3) Fill up the filesystem
47# 4) Destroy the volume
48# 5) Verify can write more data to the filesystem
49#
50# TESTABILITY: explicit
51#
52# TEST_AUTOMATION_LEVEL: automated
53#
54# CODING_STATUS: COMPLETED (2005-07-19)
55#
56# __stc_assertion_end
57#
58################################################################################
59
60verify_runnable "global"
61
62log_assert "Destroying a regular volume with reservation allows more data to" \
63	" be written to top level filesystem"
64
65space_avail=`get_prop available $TESTPOOL`
66
67#
68# To make sure this test doesn't take too long to execute on
69# large pools, we calculate a volume size which will ensure we
70# have RESV_FREE_SPACE left free in the pool.
71#
72(( vol_set_size = space_avail * 95 / 100 ))
73vol_set_size=$(floor_volsize $vol_set_size $BLOCK_SIZE)
74
75# Creating a regular volume implicitly sets its reservation
76# property to the same value.
77log_must $ZFS create -b $BLOCK_SIZE -V $vol_set_size $TESTPOOL/$TESTVOL
78
79space_avail_still=`get_prop available $TESTPOOL`
80
81# Create a secondary filesystem to soak up what's left to get
82# to RESV_FREE_SPACE for the pool.
83space_avail_still=`get_prop available $TESTPOOL`
84(( zfs_res = space_avail_still - RESV_FREE_SPACE ))
85log_must $ZFS create -o refreservation=$zfs_res $TESTPOOL/$TESTFS2
86
87space_avail_still=`get_prop available $TESTPOOL`
88
89fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
90write_count=`expr $fill_size / $BLOCK_SIZE`
91
92# Now fill up the filesystem (which doesn't have a reservation set
93# and thus will use up whatever free space is left in the pool).
94$FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE \
95        -c $write_count -d 0
96ret=$?
97if (( $ret != $ENOSPC )); then
98	log_fail "Did not get ENOSPC as expected (got $ret)."
99fi
100
101log_must $ZFS destroy -f $TESTPOOL/$TESTVOL
102
103log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE \
104        -c 1000 -d 0
105
106log_pass "Destroying volume with reservation allows more data to" \
107	" be written to top level filesystem"
108