1 #
2 # CDDL HEADER START
3 #
4 # The contents of this file are subject to the terms of the
5 # Common Development and Distribution License (the "License").
6 # You may not use this file except in compliance with the License.
7 #
8 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 # or http://www.opensolaris.org/os/licensing.
10 # See the License for the specific language governing permissions
11 # and limitations under the License.
12 #
13 # When distributing Covered Code, include this CDDL HEADER in each
14 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 # If applicable, add the following below this CDDL HEADER, with the
16 # fields enclosed by brackets "[]" replaced with your own identifying
17 # information: Portions Copyright [yyyy] [name of copyright owner]
18 #
19 # CDDL HEADER END
20 #
21
22 #
23 # Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 # Use is subject to license terms.
25 #
26
27 #
28 # Copyright (c) 2013 by Delphix. All rights reserved.
29 #
30
31 . $STF_SUITE/tests/functional/reservation/reservation.cfg
32
33 #
34 # Function to set the reservation property of a dataset to
35 # 'none' and verify that it is correctly set using both the
36 # "normal" 'zfs get reservation' and the '-p' option which
37 # gives a numerical value.
38 #
39 function zero_reservation
40 {
41 typeset resv_val
42 dataset=$1
43
44 log_must $ZFS set reservation=none $dataset
45
46 resv_val=`$ZFS get -H reservation $dataset | awk '{print $3}'`
47 if [[ $? -ne 0 ]]; then
48 log_fail "Unable to get reservation prop on $dataset"
49 elif [[ $resv_val != "none" ]]; then
50 log_fail "Reservation not 'none' ($resv_val) as expected"
51 fi
52
53
54 resv_val=`$ZFS get -pH reservation $dataset | awk '{print $3}'`
55 if [[ $? -ne 0 ]]; then
56 log_fail "Unable to get reservation prop on $dataset"
57 elif [[ $resv_val -ne 0 ]]; then
58 log_fail "Reservation not 0 ($resv_val) as expected"
59 fi
60
61 return 0
62 }
63
64 #
65 # Utility function to see if two values are within a certain specified
66 # limit of each other. Used primarily to check that a dataset's parent
67 # is correctly accounting for space used/available. Need this function as
68 # currently there is some slop in the way space is accounted (i.e. can't
69 # do a direct comparison).
70 #
71 function within_limits
72 {
73 typeset -l valA=$1
74 typeset -l valB=$2
75 typeset -l delta=$3
76
77 if ((valA <= valB)); then
78 if (((valB - valA) <= delta)); then
79 return 0
80 fi
81 elif ((valB <= valA)); then
82 if (((valA - valB) <= delta)); then
83 return 0
84 fi
85 fi
86
87 return 1
88 }
89
90 #
91 # Function to create and mount multiple filesystems. The filesystem
92 # will be named according to the name specified with a suffix value
93 # taken from the loop counter.
94 #
95 function create_multiple_fs # num_fs base_fs_name base_mnt_name
96 {
97 typeset -i iter=0
98 typeset -i count=$1
99 typeset FS_NAME=$2
100 typeset MNT_NAME=$3
101
102 while (($iter < $count)); do
103 log_must $ZFS create ${FS_NAME}$iter
104 log_must $ZFS set mountpoint=${MNT_NAME}$iter ${FS_NAME}$iter
105 ((iter = iter + 1))
106 done
107 }
108
109 #
110 # This function compute the largest volume size which is multiple of volume
111 # block size (default 8K) and not greater than the largest expected volsize.
112 #
113 # $1 The largest expected volume size.
114 # $2 The volume block size
115 #
116 function floor_volsize #<largest_volsize> [volblksize]
117 {
118 typeset -l largest_volsize=$1
119 typeset -l volblksize=${2:-8192}
120
121 if ((largest_volsize < volblksize)); then
122 log_fail "The largest_volsize must be greater than volblksize."
123 fi
124 typeset -l real_volsize
125 typeset -l n
126
127 ((n = largest_volsize / volblksize))
128 ((largest_volsize = volblksize * n))
129
130 print $largest_volsize
131 }
132
133 #
134 # This function is a copy of a function by the same name in libzfs_dataset.c
135 # Its purpose is to reserve additional space for volume metadata so volumes
136 # don't unexpectedly run out of room.
137 #
138 # Note: This function can be used to do an estimate for a volume that has not
139 # yet been created. In this case, $vol is not a volume, but rather a pool in
140 # which a volume is going to be created. In this case, use default properties.
141 #
142 function volsize_to_reservation
143 {
144 typeset vol=$1
145 typeset -i volsize=$2
146
147 typeset -i DN_MAX_INDBLKSHIFT=14
148 typeset -i SPA_BLKPTRSHIFT=7
149 typeset -i SPA_DVAS_PER_BP=3
150
151 typeset -i DNODES_PER_LEVEL_SHIFT=$((DN_MAX_INDBLKSHIFT - \
152 SPA_BLKPTRSHIFT))
153 typeset -i DNODES_PER_LEVEL=$((1 << $DNODES_PER_LEVEL_SHIFT))
154
155 if ds_is_volume $vol; then
156 typeset -i ncopies=$(get_prop copies $vol)
157 typeset -i volblocksize=$(get_prop volblocksize $vol)
158 else
159 typeset -i ncopies=1
160 typeset -i volblocksize=8192
161 fi
162 typeset -i nblocks=$((volsize / volblocksize))
163
164 typeset -i numdb=7
165 while ((nblocks > 1)); do
166 ((nblocks += DNODES_PER_LEVEL - 1))
167 ((nblocks /= DNODES_PER_LEVEL))
168 ((numdb += nblocks))
169 done
170
171 ((numdb *= SPA_DVAS_PER_BP < ncopies + 1 ? SPA_DVAS_PER_BP : \
172 ncopies + 1))
173 ((volsize *= ncopies))
174 ((numdb *= 1 << DN_MAX_INDBLKSHIFT))
175 ((volsize += numdb))
176 echo $volsize
177 }
178
179 #
180 # This function takes a pool name as an argument, and returns the largest (give
181 # or take some slop) -V value that can be used to create a volume in that pool.
182 # This is necessary because during volume creation, a reservation is created
183 # that will be larger than the value specified with -V, and potentially larger
184 # than the available space in the pool. See volsize_to_reservation().
185 #
186 function largest_volsize_from_pool
187 {
188 typeset pool=$1
189 typeset -i poolsize=$(get_prop available $pool)
190 typeset -i volsize=$poolsize
191 typeset -i nvolsize
192
193 while :; do
194 # knock 50M off the volsize each time through
195 ((volsize -= 50 * 1024 * 1024))
196 nvolsize=$(volsize_to_reservation $pool $volsize)
197 nvolsize=$(floor_volsize $nvolsize)
198 ((nvolsize < poolsize)) && break
199 done
200 echo $volsize
201 }