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 2009 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_015_pos
35#
36# DESCRIPTION:
37#
38# In pool with a full filesystem and a regular volume with an implicit
39# reservation, setting the reservation on the volume to 'none' should allow
40# more data to be written to the filesystem.
41#
42#
43# STRATEGY:
44# 1) Create a regular non-sparse volume (which implicitly sets the reservation
45#    property to a value equal to the volume size)
46# 2) Create a filesystem at the same level
47# 3) Fill up the filesystem
48# 4) Set the reservation on the volume to 'none'
49# 5) Verify can write more data to the filesystem
50#
51# TESTABILITY: explicit
52#
53# TEST_AUTOMATION_LEVEL: automated
54#
55# CODING_STATUS: COMPLETED (2005-07-19)
56#
57# __stc_assertion_end
58#
59################################################################################
60
61verify_runnable "global"
62
63log_assert "Setting volume reservation to 'none' allows more data to" \
64	" be written to top level filesystem"
65
66space_avail=`get_prop available $TESTPOOL`
67
68#
69# To make sure this test doesn't take too long to execute on
70# large pools, we calculate a volume size which when applied
71# to the volume will ensure we have RESV_FREE_SPACE
72# left free in the pool which we can quickly fill.
73#
74# For the volume itself, set a reservation to 95% of available
75# space to allow space for metadata.
76#
77(( resv_size_set = space_avail * 95 / 100 ))
78resv_size_set=$(floor_volsize $resv_size_set $BLOCK_SIZE)
79
80log_must $ZFS create -b $BLOCK_SIZE -V $resv_size_set $TESTPOOL/$TESTVOL
81
82# Create a secondary filesystem to soak up what's left to get
83# to RESV_FREE_SPACE for the pool.
84space_avail_still=`get_prop available $TESTPOOL`
85(( zfs_res = space_avail_still - RESV_FREE_SPACE ))
86log_must $ZFS create -o refreservation=$zfs_res $TESTPOOL/$TESTFS2
87
88space_avail_still=`get_prop available $TESTPOOL`
89
90fill_size=`expr $space_avail_still + $RESV_TOLERANCE`
91write_count=`expr $fill_size / $BLOCK_SIZE`
92
93# Now fill up the filesystem (which doesn't have a reservation set
94# and thus will use up whatever free space is left in the pool).
95$FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE \
96        -c $write_count -d 0
97ret=$?
98
99if (( $ret != $ENOSPC )); then
100	log_fail "Did not get ENOSPC as expected (got $ret)."
101fi
102
103log_must $ZFS set refreservation=none $TESTPOOL/$TESTVOL
104
105log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $BLOCK_SIZE \
106        -c 1000 -d 0
107
108log_pass "Setting top level volume reservation to 'none' allows more " \
109	"data to be written to the top level filesystem"
110