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
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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_015_pos.ksh	1.4	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_015_pos
40#
41# DESCRIPTION:
42#
43# In pool with a full filesystem and a regular volume with an implicit
44# reservation, setting the reservation on the volume to 'none' should allow
45# more data to be written to the filesystem.
46#
47#
48# STRATEGY:
49# 1) Create a regular non-sparse volume (which implicitly sets the reservation
50#    property to a value equal to the volume size)
51# 2) Create a filesystem at the same level
52# 3) Fill up the filesystem
53# 4) Set the reservation on the volume to 'none'
54# 5) Verify can write more data to the filesystem
55#
56# TESTABILITY: explicit
57#
58# TEST_AUTOMATION_LEVEL: automated
59#
60# CODING_STATUS: COMPLETED (2005-07-19)
61#
62# __stc_assertion_end
63#
64################################################################################
65
66verify_runnable "global"
67
68log_assert "Setting volume reservation to 'none' allows more data to" \
69	" be written to top level filesystem"
70
71space_avail=`get_prop available $TESTPOOL`
72
73#
74# To make sure this test doesn't take too long to execute on
75# large pools, we calculate a volume size which when applied
76# to the volume will ensure we have RESV_FREE_SPACE
77# left free in the pool which we can quickly fill.
78#
79# For the volume itself, set a reservation to 95% of available
80# space to allow space for metadata.
81#
82(( resv_size_set = space_avail * 95 / 100 ))
83resv_size_set=$(floor_volsize $resv_size_set $BLOCK_SIZE)
84
85log_must $ZFS create -b $BLOCK_SIZE -V $resv_size_set $TESTPOOL/$TESTVOL
86
87# Create a secondary filesystem to soak up what's left to get
88# to RESV_FREE_SPACE for the pool.
89space_avail_still=`get_prop available $TESTPOOL`
90(( zfs_res = space_avail_still - RESV_FREE_SPACE ))
91log_must $ZFS create -o refreservation=$zfs_res $TESTPOOL/$TESTFS2
92
93space_avail_still=`get_prop available $TESTPOOL`
94
95fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
96write_count=`expr $fill_size / $BLOCK_SIZE`
97
98# Now fill up the filesystem (which doesn't have a reservation set
99# and thus will use up whatever free space is left in the pool).
100$FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE \
101        -c $write_count -d 0
102ret=$?
103
104if (( $ret != $ENOSPC )); then
105	log_fail "Did not get ENOSPC as expected (got $ret)."
106fi
107
108log_must $ZFS set refreservation=none $TESTPOOL/$TESTVOL
109
110log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE \
111        -c 1000 -d 0
112
113log_pass "Setting top level volume reservation to 'none' allows more " \
114	"data to be written to the top level filesystem"
115