scripts/kvm/kvm_stat: Cleanup and pre-init perf_event_attr
[qemu.git] / tests / qemu-iotests / 112
blob34ba06acd6f95aeeaed31437856a8d6e5c3880e1
1 #!/bin/bash
3 # Test cases for different refcount_bits values
5 # Copyright (C) 2015 Red Hat, Inc.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 # creator
22 owner=mreitz@redhat.com
24 seq="$(basename $0)"
25 echo "QA output created by $seq"
27 here="$PWD"
28 tmp=/tmp/$$
29 status=1 # failure is the default!
31 _cleanup()
33 _cleanup_test_img
35 trap "_cleanup; exit \$status" 0 1 2 3 15
37 # get standard environment, filters and checks
38 . ./common.rc
39 . ./common.filter
41 # This tests qcow2-specific low-level functionality
42 _supported_fmt qcow2
43 _supported_proto file
44 _supported_os Linux
45 # This test will set refcount_bits on its own which would conflict with the
46 # manual setting; compat will be overridden as well
47 _unsupported_imgopts refcount_bits 'compat=0.10'
49 function print_refcount_bits()
51 $QEMU_IMG info "$TEST_IMG" | sed -n '/refcount bits:/ s/^ *//p'
54 echo
55 echo '=== refcount_bits limits ==='
56 echo
58 # Must be positive (non-zero)
59 IMGOPTS="$IMGOPTS,refcount_bits=0" _make_test_img 64M
60 # Must be positive (non-negative)
61 IMGOPTS="$IMGOPTS,refcount_bits=-1" _make_test_img 64M
62 # May not exceed 64
63 IMGOPTS="$IMGOPTS,refcount_bits=128" _make_test_img 64M
64 # Must be a power of two
65 IMGOPTS="$IMGOPTS,refcount_bits=42" _make_test_img 64M
67 # 1 is the minimum
68 IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M
69 print_refcount_bits
71 # 64 is the maximum
72 IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M
73 print_refcount_bits
75 # 16 is the default
76 _make_test_img 64M
77 print_refcount_bits
79 echo
80 echo '=== refcount_bits and compat=0.10 ==='
81 echo
83 # Should work
84 IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=16" _make_test_img 64M
85 print_refcount_bits
87 # Should not work
88 IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=1" _make_test_img 64M
89 IMGOPTS="$IMGOPTS,compat=0.10,refcount_bits=64" _make_test_img 64M
92 echo
93 echo '=== Snapshot limit on refcount_bits=1 ==='
94 echo
96 IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M
97 print_refcount_bits
99 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
101 # Should fail for now; in the future, this might be supported by automatically
102 # copying all clusters with overflowing refcount
103 $QEMU_IMG snapshot -c foo "$TEST_IMG"
105 # The new L1 table could/should be leaked
106 _check_test_img
108 echo
109 echo '=== Snapshot limit on refcount_bits=2 ==='
110 echo
112 IMGOPTS="$IMGOPTS,refcount_bits=2" _make_test_img 64M
113 print_refcount_bits
115 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
117 # Should succeed
118 $QEMU_IMG snapshot -c foo "$TEST_IMG"
119 $QEMU_IMG snapshot -c bar "$TEST_IMG"
120 # Should fail (4th reference)
121 $QEMU_IMG snapshot -c baz "$TEST_IMG"
123 # The new L1 table could/should be leaked
124 _check_test_img
126 echo
127 echo '=== Compressed clusters with refcount_bits=1 ==='
128 echo
130 IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M
131 print_refcount_bits
133 # Both should fit into a single host cluster; instead of failing to increase the
134 # refcount of that cluster, qemu should just allocate a new cluster and make
135 # this operation succeed
136 $QEMU_IO -c 'write -P 0 -c 0 64k' \
137 -c 'write -P 1 -c 64k 64k' \
138 "$TEST_IMG" | _filter_qemu_io
140 _check_test_img
142 echo
143 echo '=== MSb set in 64 bit refcount ==='
144 echo
146 IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M
147 print_refcount_bits
149 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
151 # Set the MSb in the refblock entry of the data cluster
152 poke_file "$TEST_IMG" $((0x20028)) "\x80\x00\x00\x00\x00\x00\x00\x00"
154 # Clear OFLAG_COPIED in the L2 entry of the data cluster
155 poke_file "$TEST_IMG" $((0x40000)) "\x00\x00\x00\x00\x00\x05\x00\x00"
157 # Try to write to that cluster (should work, even though the MSb is set)
158 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
160 echo
161 echo '=== Snapshot on maximum 64 bit refcount value ==='
162 echo
164 IMGOPTS="$IMGOPTS,refcount_bits=64" _make_test_img 64M
165 print_refcount_bits
167 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
169 # Set the refblock entry to the maximum value possible
170 poke_file "$TEST_IMG" $((0x20028)) "\xff\xff\xff\xff\xff\xff\xff\xff"
172 # Clear OFLAG_COPIED in the L2 entry of the data cluster
173 poke_file "$TEST_IMG" $((0x40000)) "\x00\x00\x00\x00\x00\x05\x00\x00"
175 # Try a snapshot (should correctly identify the overflow; may work in the future
176 # by falling back to COW)
177 $QEMU_IMG snapshot -c foo "$TEST_IMG"
179 # The new L1 table could/should be leaked; and obviously the data cluster is
180 # leaked (refcount=UINT64_MAX reference=1)
181 _check_test_img
183 echo
184 echo '=== Amend from refcount_bits=16 to refcount_bits=1 ==='
185 echo
187 _make_test_img 64M
188 print_refcount_bits
190 $QEMU_IO -c 'write 16M 32M' "$TEST_IMG" | _filter_qemu_io
191 $QEMU_IMG amend -o refcount_bits=1 "$TEST_IMG"
192 _check_test_img
193 print_refcount_bits
195 echo
196 echo '=== Amend from refcount_bits=1 to refcount_bits=64 ==='
197 echo
199 $QEMU_IMG amend -o refcount_bits=64 "$TEST_IMG"
200 _check_test_img
201 print_refcount_bits
203 echo
204 echo '=== Amend to compat=0.10 ==='
205 echo
207 # Should not work because refcount_bits needs to be 16 for compat=0.10
208 $QEMU_IMG amend -o compat=0.10 "$TEST_IMG"
209 print_refcount_bits
210 # Should work
211 $QEMU_IMG amend -o compat=0.10,refcount_bits=16 "$TEST_IMG"
212 _check_test_img
213 print_refcount_bits
215 # Get back to compat=1.1 and refcount_bits=16
216 $QEMU_IMG amend -o compat=1.1 "$TEST_IMG"
217 print_refcount_bits
218 # Should not work
219 $QEMU_IMG amend -o refcount_bits=32,compat=0.10 "$TEST_IMG"
220 print_refcount_bits
222 echo
223 echo '=== Amend with snapshot ==='
224 echo
226 $QEMU_IMG snapshot -c foo "$TEST_IMG"
227 # Just to have different refcounts across the image
228 $QEMU_IO -c 'write 0 16M' "$TEST_IMG" | _filter_qemu_io
230 # Should not work (may work in the future by first decreasing all refcounts so
231 # they fit into the target range by copying them)
232 $QEMU_IMG amend -o refcount_bits=1 "$TEST_IMG"
233 _check_test_img
234 print_refcount_bits
236 # Should work
237 $QEMU_IMG amend -o refcount_bits=2 "$TEST_IMG"
238 _check_test_img
239 print_refcount_bits
241 echo
242 echo '=== Testing too many references for check ==='
243 echo
245 IMGOPTS="$IMGOPTS,refcount_bits=1" _make_test_img 64M
246 print_refcount_bits
248 # This cluster should be created at 0x50000
249 $QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
250 # Now make the second L2 entry (the L2 table should be at 0x40000) point to that
251 # cluster, so we have two references
252 poke_file "$TEST_IMG" $((0x40008)) "\x80\x00\x00\x00\x00\x05\x00\x00"
254 # This should say "please use amend"
255 _check_test_img -r all
257 # So we do that
258 $QEMU_IMG amend -o refcount_bits=2 "$TEST_IMG"
259 print_refcount_bits
261 # And try again
262 _check_test_img -r all
264 echo
265 echo '=== Multiple walks necessary during amend ==='
266 echo
268 IMGOPTS="$IMGOPTS,refcount_bits=1,cluster_size=512" _make_test_img 64k
270 # Cluster 0 is the image header, clusters 1 to 4 are used by the L1 table, a
271 # single L2 table, the reftable and a single refblock. This creates 58 data
272 # clusters (actually, the L2 table is created here, too), so in total there are
273 # then 63 used clusters in the image. With a refcount width of 64, one refblock
274 # describes 64 clusters (512 bytes / 64 bits/entry = 64 entries), so this will
275 # make the first refblock in the amended image have exactly one free entry.
276 $QEMU_IO -c "write 0 $((58 * 512))" "$TEST_IMG" | _filter_qemu_io
278 # Now change the refcount width; since the first new refblock will have exactly
279 # one free entry, that entry will be used to store its own reference. No other
280 # refblocks are needed, so then the new reftable will be allocated; since the
281 # first new refblock is completely filled up, this will require a new refblock
282 # which is why the refcount width changing function will need to run through
283 # everything one more time until the allocations are stable.
284 # Having more walks than usual should be visible as regressing progress (from
285 # 66.67 % (2/3 walks) to 50.00 % (2/4 walks)).
286 $QEMU_IMG amend -o refcount_bits=64 -p "$TEST_IMG" | tr '\r' '\n' \
287 | grep -A 1 '66.67'
288 print_refcount_bits
290 _check_test_img
293 # success, all done
294 echo '*** done'
295 rm -f $seq.full
296 status=0