1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#!/bin/bash
# Copyright (C) 2013 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# no automatic extensions please
SKIP_WITH_LVMLOCKD=1
SKIP_WITH_LVMPOLLD=1
. lib/inittest
MKFS=mkfs.ext2
which $MKFS || skip
fill() {
dd if=/dev/zero of="$DM_DEV_DIR/${2:-$vg1/lvol0}" bs=$1 count=1 oflag=direct || \
die "Snapshot does not fit $1"
}
# Wait until device is opened
wait_for_open_() {
for i in $(seq 1 50) ; do
test $(dmsetup info --noheadings -c -o open $1) -ne 0 && return
sleep 0.1
done
die "$1 expected to be openned, but it's not!"
}
cleanup_tail()
{
test -z "$SLEEP_PID" || kill $SLEEP_PID || true
wait
vgremove -ff $vg1 || true
vgremove -ff $vg
aux teardown
}
TSIZE=15P
aux can_use_16T || TSIZE=15T
# With different snapshot target driver we may obtain different results.
# Older targets have metadata leak bug which needs extra compenstion.
# Ancient targets do not even provide separate info for metadata.
EXPECT1="16.00k"
EXPECT2="512.00k"
EXPECT3="32.00k"
EXPECT4="66.67"
if aux target_at_least dm-snapshot 1 10 0 ; then
# Extra metadata size
EXPECT4="0.00"
if aux target_at_least dm-snapshot 1 12 0 ; then
# When fixed leak, expect smaller sizes
EXPECT1="12.00k"
EXPECT2="384.00k"
EXPECT3="28.00k"
fi
fi
aux prepare_pvs 1
vgcreate -s 4M $vg $(cat DEVICES)
# Play with 1 extent
lvcreate -aey -l1 -n $lv $vg
# 100%LV is not supported for snapshot
fail lvcreate -s -l 100%LV -n snap $vg/$lv 2>&1 | tee out
grep 'Please express size as %FREE, %ORIGIN, %PVS or %VG' out
# 100%ORIGIN needs to have enough space for all data and needs to round-up
lvcreate -s -l 100%ORIGIN -n $lv1 $vg/$lv
# everything needs to fit
fill 4M $vg/$lv1
lvremove -f $vg
# Automatically activates exclusively in cluster
lvcreate --type snapshot -s -l 100%FREE -n $lv $vg --virtualsize $TSIZE
aux extend_filter_LVMTEST
aux lvmconf "activation/snapshot_autoextend_percent = 20" \
"activation/snapshot_autoextend_threshold = 50"
# Check usability with smallest (1k) extent size ($lv has 15P)
pvcreate --setphysicalvolumesize 4T "$DM_DEV_DIR/$vg/$lv"
trap 'cleanup_tail' EXIT
vgcreate -s 1K $vg1 "$DM_DEV_DIR/$vg/$lv"
# Play with small 1k 128 extents
lvcreate -aey -L128K -n $lv $vg1
# 100%ORIGIN needs to have enough space for all data
lvcreate -s -l 100%ORIGIN -n snap100 $vg1/$lv
# everything needs to fit
fill 128k $vg1/snap100
# 50%ORIGIN needs to have enough space for 50% of data
lvcreate -s -l 50%ORIGIN -n snap50 $vg1/$lv
fill 64k $vg1/snap50
lvcreate -s -l 25%ORIGIN -n snap25 $vg1/$lv
fill 32k $vg1/snap25
# Check we do not provide too much extra space
not fill 33k $vg1/snap25
lvs -a $vg1
lvremove -f $vg1
# Test virtual snapshot over /dev/zero
lvcreate --type snapshot -V50 -L10 -n $lv1 -s $vg1
CHECK_ACTIVE="active"
test ! -e LOCAL_CLVMD || CHECK_ACTIVE="local exclusive"
check lv_field $vg1/$lv1 lv_active "$CHECK_ACTIVE"
lvchange -an $vg1
# On cluster snapshot gets exclusive activation
lvchange -ay $vg1
check lv_field $vg1/$lv1 lv_active "$CHECK_ACTIVE"
# Test removal of opened (but unmounted) snapshot (device busy) for a while
sleep 120 < "$DM_DEV_DIR/$vg1/$lv1" &
SLEEP_PID=$!
wait_for_open_ "$vg1-$lv1"
# Opened virtual snapshot device is not removable
# it should retry device removal for a few seconds
not lvremove -f $vg1/$lv1
kill $SLEEP_PID
SLEEP_PID=
# Wait for killed task, so there is no device holder
wait
lvremove -f $vg1/$lv1
check lv_not_exists $vg1 $lv1
# Check border size
lvcreate -aey -L4095G $vg1
lvcreate -s -L100K $vg1/lvol0
fill 1K
check lv_field $vg1/lvol1 data_percent "12.00"
lvremove -ff $vg1
# Create 1KB snapshot, does not need to be active here
lvcreate -an -Zn -l1 -n $lv1 $vg1
not lvcreate -s -l1 $vg1/$lv1
not lvcreate -s -l3 $vg1/$lv1
lvcreate -s -l30 -n $lv2 $vg1/$lv1
check lv_field $vg1/$lv2 size "$EXPECT1"
not lvcreate -s -c512 -l512 $vg1/$lv1
lvcreate -s -c128 -l1700 -n $lv3 $vg1/$lv1
# 3 * 128
check lv_field $vg1/$lv3 size "$EXPECT2"
lvremove -ff $vg1
lvcreate -aey -l20 $vg1
lvcreate -s -l12 $vg1/lvol0
# Fill 1KB -> 100% snapshot (1x 4KB chunk)
fill 1K
check lv_field $vg1/lvol1 data_percent "100.00"
# Check it resizes 100% full valid snapshot to fit threshold
lvextend --use-policies $vg1/lvol1
check lv_field $vg1/lvol1 data_percent "50.00"
fill 4K
lvextend --use-policies $vg1/lvol1
check lv_field $vg1/lvol1 size "24.00k"
lvextend -l+33 $vg1/lvol1
check lv_field $vg1/lvol1 size "$EXPECT3"
fill 20K
lvremove -f $vg1
# Check snapshot really deletes COW header for read-only snapshot
# Test needs special relation between chunk size and extent size
# This test expects extent size 1K
aux lvmconf "allocation/wipe_signatures_when_zeroing_new_lvs = 1"
lvcreate -aey -L4 -n $lv $vg1
lvcreate -c 8 -s -L1 -n snap $vg1/$lv
# Populate snapshot
#dd if=/dev/urandom of="$DM_DEV_DIR/$vg1/$lv" bs=4096 count=10
$MKFS "$DM_DEV_DIR/$vg1/$lv"
lvremove -f $vg1/snap
# Undeleted header would trigger attempt to access
# beyond end of COW device
# Fails to create when chunk size is different
lvcreate -s -pr -l12 -n snap $vg1/$lv
# When header is undelete, fails to read snapshot without read errors
#dd if="$DM_DEV_DIR/$vg1/snap" of=/dev/null bs=1M count=2
fsck -n "$DM_DEV_DIR/$vg1/snap"
# This test would trigger read of weird percentage for undeleted header
# And since older snapshot target counts with metadata sectors
# we have 2 valid results (unsure about correct version number)
check lv_field $vg1/snap data_percent "$EXPECT4"
vgremove -ff $vg1
|
