| 1 | #!/usr/bin/env bash |
| 2 | # group: rw auto backing quick |
| 3 | # |
| 4 | # qcow2 specific bdrv_pwrite_zeroes tests with backing files (complements 034) |
| 5 | # |
| 6 | # Copyright (C) 2016-2017 Red Hat, Inc. |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation; either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | # This program is distributed in the hope that it will be useful, |
| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | # GNU General Public License for more details. |
| 17 | # |
| 18 | # You should have received a copy of the GNU General Public License |
| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | # |
| 21 | |
| 22 | # creator |
| 23 | owner=kwolf@redhat.com |
| 24 | |
| 25 | seq=`basename $0` |
| 26 | echo "QA output created by $seq" |
| 27 | |
| 28 | status=1 # failure is the default! |
| 29 | |
| 30 | _cleanup() |
| 31 | { |
| 32 | _cleanup_test_img |
| 33 | } |
| 34 | trap "_cleanup; exit \$status" 0 1 2 3 15 |
| 35 | |
| 36 | # get standard environment, filters and checks |
| 37 | . ./common.rc |
| 38 | . ./common.filter |
| 39 | |
| 40 | _supported_fmt qcow2 |
| 41 | _supported_proto file fuse |
| 42 | _supported_os Linux |
| 43 | |
| 44 | CLUSTER_SIZE=4k |
| 45 | size=$((128 * 1024 * 1024)) |
| 46 | |
| 47 | # This test requires zero clusters, added in v3 images |
| 48 | _unsupported_imgopts compat=0.10 |
| 49 | |
| 50 | echo |
| 51 | echo == backing file contains zeros == |
| 52 | |
| 53 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 54 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 55 | |
| 56 | # Make sure that the whole cluster is allocated even for partial write_zeroes |
| 57 | # when the backing file contains zeros |
| 58 | |
| 59 | # X = non-zero data sector in backing file |
| 60 | # - = sector unallocated in whole backing chain |
| 61 | # 0 = sector touched by write_zeroes request |
| 62 | |
| 63 | # 1. Tail unaligned: 00 00 -- -- |
| 64 | # 2. Head unaligned: -- -- 00 00 |
| 65 | # 3. Both unaligned: -- 00 00 -- |
| 66 | # 4. Both, 2 clusters: -- -- -- 00 | 00 -- -- -- |
| 67 | |
| 68 | $QEMU_IO -c "write -z 0 2k" "$TEST_IMG" | _filter_qemu_io |
| 69 | $QEMU_IO -c "write -z 10k 2k" "$TEST_IMG" | _filter_qemu_io |
| 70 | $QEMU_IO -c "write -z 17k 2k" "$TEST_IMG" | _filter_qemu_io |
| 71 | $QEMU_IO -c "write -z 27k 2k" "$TEST_IMG" | _filter_qemu_io |
| 72 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 73 | |
| 74 | echo |
| 75 | echo == backing file contains non-zero data before write_zeroes == |
| 76 | |
| 77 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 78 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 79 | |
| 80 | # Single cluster; non-zero data at the cluster start |
| 81 | # ... | XX -- 00 -- | ... |
| 82 | $QEMU_IO -c "write -P 0x11 32k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 83 | $QEMU_IO -c "write -z 34k 1k" "$TEST_IMG" | _filter_qemu_io |
| 84 | $QEMU_IO -c "read -P 0x11 32k 1k" "$TEST_IMG" | _filter_qemu_io |
| 85 | $QEMU_IO -c "read -P 0 33k 3k" "$TEST_IMG" | _filter_qemu_io |
| 86 | |
| 87 | # Single cluster; non-zero data exists, but not at the cluster start |
| 88 | # ... | -- XX 00 -- | ... |
| 89 | $QEMU_IO -c "write -P 0x11 65k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 90 | $QEMU_IO -c "write -z 66k 1k" "$TEST_IMG" | _filter_qemu_io |
| 91 | $QEMU_IO -c "read -P 0x11 65k 1k" "$TEST_IMG" | _filter_qemu_io |
| 92 | $QEMU_IO -c "read -P 0 64k 1k" "$TEST_IMG" | _filter_qemu_io |
| 93 | $QEMU_IO -c "read -P 0 66k 2k" "$TEST_IMG" | _filter_qemu_io |
| 94 | |
| 95 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 96 | |
| 97 | echo |
| 98 | echo == backing file contains non-zero data after write_zeroes == |
| 99 | |
| 100 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 101 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 102 | |
| 103 | # Single cluster; non-zero data directly after request |
| 104 | # ... | -- 00 XX -- | ... |
| 105 | $QEMU_IO -c "write -P 0x11 34k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 106 | $QEMU_IO -c "write -z 33k 1k" "$TEST_IMG" | _filter_qemu_io |
| 107 | $QEMU_IO -c "read -P 0 32k 2k" "$TEST_IMG" | _filter_qemu_io |
| 108 | $QEMU_IO -c "read -P 0x11 34k 1k" "$TEST_IMG" | _filter_qemu_io |
| 109 | $QEMU_IO -c "read -P 0 35k 1k" "$TEST_IMG" | _filter_qemu_io |
| 110 | |
| 111 | # Single cluster; non-zero data exists, but not directly after request |
| 112 | # ... | -- 00 -- XX | ... |
| 113 | $QEMU_IO -c "write -P 0x11 43k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 114 | $QEMU_IO -c "write -z 41k 1k" "$TEST_IMG" | _filter_qemu_io |
| 115 | $QEMU_IO -c "read -P 0x11 43k 1k" "$TEST_IMG" | _filter_qemu_io |
| 116 | $QEMU_IO -c "read -P 0 40k 3k" "$TEST_IMG" | _filter_qemu_io |
| 117 | |
| 118 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 119 | |
| 120 | echo |
| 121 | echo == write_zeroes covers non-zero data == |
| 122 | |
| 123 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 124 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 125 | |
| 126 | # non-zero data at front of request |
| 127 | # Backing file: -- XX -- -- |
| 128 | # Active layer: -- 00 00 -- |
| 129 | |
| 130 | $QEMU_IO -c "write -P 0x11 5k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 131 | $QEMU_IO -c "write -z 5k 2k" "$TEST_IMG" | _filter_qemu_io |
| 132 | $QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io |
| 133 | |
| 134 | # non-zero data at end of request |
| 135 | # Backing file: -- -- XX -- |
| 136 | # Active layer: -- 00 00 -- |
| 137 | |
| 138 | $QEMU_IO -c "write -P 0x11 14k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 139 | $QEMU_IO -c "write -z 13k 2k" "$TEST_IMG" | _filter_qemu_io |
| 140 | $QEMU_IO -c "read -P 0 12k 4k" "$TEST_IMG" | _filter_qemu_io |
| 141 | |
| 142 | # non-zero data matches size of request |
| 143 | # Backing file: -- XX XX -- |
| 144 | # Active layer: -- 00 00 -- |
| 145 | |
| 146 | $QEMU_IO -c "write -P 0x11 21k 2k" "$TEST_IMG.base" | _filter_qemu_io |
| 147 | $QEMU_IO -c "write -z 21k 2k" "$TEST_IMG" | _filter_qemu_io |
| 148 | $QEMU_IO -c "read -P 0 20k 4k" "$TEST_IMG" | _filter_qemu_io |
| 149 | |
| 150 | # non-zero data smaller than request |
| 151 | # Backing file: -- -X X- -- |
| 152 | # Active layer: -- 00 00 -- |
| 153 | |
| 154 | $QEMU_IO -c "write -P 0x11 30208 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 155 | $QEMU_IO -c "write -z 29k 2k" "$TEST_IMG" | _filter_qemu_io |
| 156 | $QEMU_IO -c "read -P 0 28k 4k" "$TEST_IMG" | _filter_qemu_io |
| 157 | |
| 158 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 159 | |
| 160 | echo |
| 161 | echo == spanning two clusters, non-zero before request == |
| 162 | |
| 163 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 164 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 165 | |
| 166 | # Two clusters; non-zero data before request: |
| 167 | # 1. At cluster start: 32k: XX -- -- 00 | 00 -- -- -- |
| 168 | # 2. Between unallocated space: 48k: -- XX -- 00 | 00 -- -- -- |
| 169 | # 3. Directly before request: 64k: -- -- XX 00 | 00 -- -- -- |
| 170 | |
| 171 | $QEMU_IO -c "write -P 0x11 32k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 172 | $QEMU_IO -c "write -z 35k 2k" "$TEST_IMG" | _filter_qemu_io |
| 173 | $QEMU_IO -c "read -P 0x11 32k 1k" "$TEST_IMG" | _filter_qemu_io |
| 174 | $QEMU_IO -c "read -P 0 33k 7k" "$TEST_IMG" | _filter_qemu_io |
| 175 | |
| 176 | $QEMU_IO -c "write -P 0x11 49k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 177 | $QEMU_IO -c "write -z 51k 2k" "$TEST_IMG" | _filter_qemu_io |
| 178 | $QEMU_IO -c "read -P 0 48k 1k" "$TEST_IMG" | _filter_qemu_io |
| 179 | $QEMU_IO -c "read -P 0x11 49k 1k" "$TEST_IMG" | _filter_qemu_io |
| 180 | $QEMU_IO -c "read -P 0 50k 6k" "$TEST_IMG" | _filter_qemu_io |
| 181 | |
| 182 | $QEMU_IO -c "write -P 0x11 66k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 183 | $QEMU_IO -c "write -z 67k 2k" "$TEST_IMG" | _filter_qemu_io |
| 184 | $QEMU_IO -c "read -P 0 64k 2k" "$TEST_IMG" | _filter_qemu_io |
| 185 | $QEMU_IO -c "read -P 0x11 66k 1k" "$TEST_IMG" | _filter_qemu_io |
| 186 | $QEMU_IO -c "read -P 0 67k 5k" "$TEST_IMG" | _filter_qemu_io |
| 187 | |
| 188 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 189 | |
| 190 | echo |
| 191 | echo == spanning two clusters, non-zero after request == |
| 192 | |
| 193 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 194 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 195 | |
| 196 | # Two clusters; non-zero data after request: |
| 197 | # 1. Directly after request: 32k: -- -- -- 00 | 00 XX -- -- |
| 198 | # 2. Between unallocated space: 48k: -- -- -- 00 | 00 -- XX -- |
| 199 | # 3. At cluster end: 64k: -- -- -- 00 | 00 -- -- XX |
| 200 | |
| 201 | $QEMU_IO -c "write -P 0x11 37k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 202 | $QEMU_IO -c "write -z 35k 2k" "$TEST_IMG" | _filter_qemu_io |
| 203 | $QEMU_IO -c "read -P 0 32k 5k" "$TEST_IMG" | _filter_qemu_io |
| 204 | $QEMU_IO -c "read -P 0x11 37k 1k" "$TEST_IMG" | _filter_qemu_io |
| 205 | $QEMU_IO -c "read -P 0 38k 2k" "$TEST_IMG" | _filter_qemu_io |
| 206 | |
| 207 | $QEMU_IO -c "write -P 0x11 54k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 208 | $QEMU_IO -c "write -z 51k 2k" "$TEST_IMG" | _filter_qemu_io |
| 209 | $QEMU_IO -c "read -P 0 48k 6k" "$TEST_IMG" | _filter_qemu_io |
| 210 | $QEMU_IO -c "read -P 0x11 54k 1k" "$TEST_IMG" | _filter_qemu_io |
| 211 | $QEMU_IO -c "read -P 0 55k 1k" "$TEST_IMG" | _filter_qemu_io |
| 212 | |
| 213 | $QEMU_IO -c "write -P 0x11 71k 1k" "$TEST_IMG.base" | _filter_qemu_io |
| 214 | $QEMU_IO -c "write -z 67k 2k" "$TEST_IMG" | _filter_qemu_io |
| 215 | $QEMU_IO -c "read -P 0 64k 7k" "$TEST_IMG" | _filter_qemu_io |
| 216 | $QEMU_IO -c "read -P 0x11 71k 1k" "$TEST_IMG" | _filter_qemu_io |
| 217 | |
| 218 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 219 | |
| 220 | echo |
| 221 | echo == spanning two clusters, partially overwriting backing file == |
| 222 | |
| 223 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 224 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 225 | |
| 226 | # Backing file: -- -- XX XX | XX XX -- -- |
| 227 | # Active layer: -- -- XX 00 | 00 XX -- -- |
| 228 | |
| 229 | $QEMU_IO -c "write -P 0x11 2k 4k" "$TEST_IMG.base" | _filter_qemu_io |
| 230 | $QEMU_IO -c "write -z 3k 2k" "$TEST_IMG" | _filter_qemu_io |
| 231 | $QEMU_IO -c "read -P 0 0k 2k" "$TEST_IMG" | _filter_qemu_io |
| 232 | $QEMU_IO -c "read -P 0x11 2k 1k" "$TEST_IMG" | _filter_qemu_io |
| 233 | $QEMU_IO -c "read -P 0 3k 2k" "$TEST_IMG" | _filter_qemu_io |
| 234 | $QEMU_IO -c "read -P 0x11 5k 1k" "$TEST_IMG" | _filter_qemu_io |
| 235 | $QEMU_IO -c "read -P 0 6k 2k" "$TEST_IMG" | _filter_qemu_io |
| 236 | |
| 237 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 238 | |
| 239 | echo |
| 240 | echo == spanning multiple clusters, non-zero in first cluster == |
| 241 | |
| 242 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 243 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 244 | |
| 245 | # Backing file: 64k: XX XX -- -- | -- -- -- -- | -- -- -- -- |
| 246 | # Active layer: 64k: XX XX 00 00 | 00 00 00 00 | 00 -- -- -- |
| 247 | |
| 248 | $QEMU_IO -c "write -P 0x11 64k 2k" "$TEST_IMG.base" | _filter_qemu_io |
| 249 | $QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io |
| 250 | $QEMU_IO -c "read -P 0x11 64k 2k" "$TEST_IMG" | _filter_qemu_io |
| 251 | $QEMU_IO -c "read -P 0 66k 10k" "$TEST_IMG" | _filter_qemu_io |
| 252 | |
| 253 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 254 | |
| 255 | echo |
| 256 | echo == spanning multiple clusters, non-zero in intermediate cluster == |
| 257 | |
| 258 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 259 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 260 | |
| 261 | # Backing file: 64k: -- -- -- -- | -- XX XX -- | -- -- -- -- |
| 262 | # Active layer: 64k: -- -- 00 00 | 00 00 00 00 | 00 -- -- -- |
| 263 | |
| 264 | $QEMU_IO -c "write -P 0x11 69k 2k" "$TEST_IMG.base" | _filter_qemu_io |
| 265 | $QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io |
| 266 | $QEMU_IO -c "read -P 0 64k 12k" "$TEST_IMG" | _filter_qemu_io |
| 267 | |
| 268 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 269 | |
| 270 | echo |
| 271 | echo == spanning multiple clusters, non-zero in final cluster == |
| 272 | |
| 273 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 274 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 275 | |
| 276 | # Backing file: 64k: -- -- -- -- | -- -- -- -- | -- -- XX XX |
| 277 | # Active layer: 64k: -- -- 00 00 | 00 00 00 00 | 00 -- XX XX |
| 278 | |
| 279 | $QEMU_IO -c "write -P 0x11 74k 2k" "$TEST_IMG.base" | _filter_qemu_io |
| 280 | $QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io |
| 281 | $QEMU_IO -c "read -P 0 64k 10k" "$TEST_IMG" | _filter_qemu_io |
| 282 | $QEMU_IO -c "read -P 0x11 74k 2k" "$TEST_IMG" | _filter_qemu_io |
| 283 | |
| 284 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 285 | |
| 286 | echo |
| 287 | echo == spanning multiple clusters, partially overwriting backing file == |
| 288 | |
| 289 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size |
| 290 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT |
| 291 | |
| 292 | # Backing file: 64k: -- XX XX XX | XX XX XX XX | XX XX XX -- |
| 293 | # Active layer: 64k: -- XX 00 00 | 00 00 00 00 | 00 XX XX -- |
| 294 | |
| 295 | $QEMU_IO -c "write -P 0x11 65k 10k" "$TEST_IMG.base" | _filter_qemu_io |
| 296 | $QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io |
| 297 | $QEMU_IO -c "read -P 0 64k 1k" "$TEST_IMG" | _filter_qemu_io |
| 298 | $QEMU_IO -c "read -P 0x11 65k 1k" "$TEST_IMG" | _filter_qemu_io |
| 299 | $QEMU_IO -c "read -P 0 66k 7k" "$TEST_IMG" | _filter_qemu_io |
| 300 | $QEMU_IO -c "read -P 0x11 73k 2k" "$TEST_IMG" | _filter_qemu_io |
| 301 | $QEMU_IO -c "read -P 0 75k 1k" "$TEST_IMG" | _filter_qemu_io |
| 302 | |
| 303 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 304 | |
| 305 | echo |
| 306 | echo == unaligned image tail cluster, no allocation needed == |
| 307 | |
| 308 | # With no backing file, write to all or part of unallocated partial cluster |
| 309 | # will mark the cluster as zero, but does not allocate. |
| 310 | # Re-create the image each time to get back to unallocated clusters. |
| 311 | |
| 312 | # Write at the front: sector-wise, the request is: 128m... | 00 -- -- -- |
| 313 | _make_test_img $((size + 2048)) |
| 314 | $QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io |
| 315 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 316 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 317 | |
| 318 | # Write at the back: sector-wise, the request is: 128m... | -- -- -- 00 |
| 319 | _make_test_img $((size + 2048)) |
| 320 | $QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io |
| 321 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 322 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 323 | |
| 324 | # Write at middle: sector-wise, the request is: 128m... | -- 00 00 -- |
| 325 | _make_test_img $((size + 2048)) |
| 326 | $QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 327 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 328 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 329 | |
| 330 | # Write entire cluster: sector-wise, the request is: 128m... | 00 00 00 00 |
| 331 | _make_test_img $((size + 2048)) |
| 332 | $QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 333 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 334 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 335 | |
| 336 | # Repeat with backing file holding unallocated cluster. |
| 337 | CLUSTER_SIZE=2048 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) |
| 338 | |
| 339 | # Write at the front: sector-wise, the request is: |
| 340 | # backing: 128m... | -- -- |
| 341 | # active: 128m... | 00 -- -- -- |
| 342 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 343 | $QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io |
| 344 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 345 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 346 | |
| 347 | # Write at the back: sector-wise, the request is: |
| 348 | # backing: 128m... | -- -- |
| 349 | # active: 128m... | -- -- -- 00 |
| 350 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 351 | $QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io |
| 352 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 353 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 354 | |
| 355 | # Write at middle: sector-wise, the request is: |
| 356 | # backing: 128m... | -- -- |
| 357 | # active: 128m... | -- 00 00 -- |
| 358 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 359 | $QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 360 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 361 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 362 | |
| 363 | # Write entire cluster: sector-wise, the request is: |
| 364 | # backing: 128m... | -- -- |
| 365 | # active: 128m... | 00 00 00 00 |
| 366 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 367 | $QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 368 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 369 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 370 | |
| 371 | # Repeat with backing file holding zero'd cluster |
| 372 | $QEMU_IO -c "write -z $size 512" "$TEST_IMG.base" | _filter_qemu_io |
| 373 | |
| 374 | # Write at the front: sector-wise, the request is: |
| 375 | # backing: 128m... | 00 00 |
| 376 | # active: 128m... | 00 -- -- -- |
| 377 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 378 | $QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io |
| 379 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 380 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 381 | |
| 382 | # Write at the back: sector-wise, the request is: |
| 383 | # backing: 128m... | 00 00 |
| 384 | # active: 128m... | -- -- -- 00 |
| 385 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 386 | $QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io |
| 387 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 388 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 389 | |
| 390 | # Write at middle: sector-wise, the request is: |
| 391 | # backing: 128m... | 00 00 |
| 392 | # active: 128m... | -- 00 00 -- |
| 393 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 394 | $QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 395 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 396 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 397 | |
| 398 | # Write entire cluster: sector-wise, the request is: |
| 399 | # backing: 128m... | 00 00 |
| 400 | # active: 128m... | 00 00 00 00 |
| 401 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 402 | $QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 403 | $QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io |
| 404 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 405 | |
| 406 | # A preallocated cluster maintains its allocation, whether it stays as |
| 407 | # data due to a partial write: |
| 408 | # Convert 128m... | XX XX => ... | XX 00 |
| 409 | _make_test_img $((size + 1024)) |
| 410 | $QEMU_IO -c "write -P 1 $((size)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 411 | $QEMU_IO -c "write -z $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io |
| 412 | $QEMU_IO -c "read -P 1 $((size)) 512" "$TEST_IMG" | _filter_qemu_io |
| 413 | $QEMU_IO -c "read -P 0 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io |
| 414 | $QEMU_IO -c "alloc $size 1024" "$TEST_IMG" | _filter_qemu_io |
| 415 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 416 | |
| 417 | # or because it is the entire cluster and can use the zero flag: |
| 418 | # Convert 128m... | XX XX => ... | 00 00 |
| 419 | $QEMU_IO -c "write -z $((size)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 420 | $QEMU_IO -c "alloc $size 1024" "$TEST_IMG" | _filter_qemu_io |
| 421 | $QEMU_IO -c "read -P 0 $size 1024" "$TEST_IMG" | _filter_qemu_io |
| 422 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 423 | |
| 424 | echo |
| 425 | echo == unaligned image tail cluster, allocation required == |
| 426 | |
| 427 | # Write beyond backing file must COW |
| 428 | # Backing file: 128m... | XX -- |
| 429 | # Active layer: 128m... | -- -- 00 -- |
| 430 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) |
| 431 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 432 | $QEMU_IO -c "write -P 1 $((size)) 512" "$TEST_IMG.base" | _filter_qemu_io |
| 433 | $QEMU_IO -c "write -z $((size + 1024)) 512" "$TEST_IMG" | _filter_qemu_io |
| 434 | $QEMU_IO -c "read -P 1 $((size)) 512" "$TEST_IMG" | _filter_qemu_io |
| 435 | $QEMU_IO -c "read -P 0 $((size + 512)) 1536" "$TEST_IMG" | _filter_qemu_io |
| 436 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 437 | |
| 438 | # Writes at boundaries of (partial) cluster must not lose mid-cluster data |
| 439 | # Backing file: 128m: ... | -- XX |
| 440 | # Active layer: 128m: ... | 00 -- -- 00 |
| 441 | CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) |
| 442 | _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $((size + 2048)) |
| 443 | $QEMU_IO -c "write -P 1 $((size + 512)) 512" "$TEST_IMG.base" | _filter_qemu_io |
| 444 | $QEMU_IO -c "write -z $((size)) 512" "$TEST_IMG" | _filter_qemu_io |
| 445 | $QEMU_IO -c "read -P 0 $((size)) 512" "$TEST_IMG" | _filter_qemu_io |
| 446 | $QEMU_IO -c "read -P 1 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io |
| 447 | $QEMU_IO -c "read -P 0 $((size + 1024)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 448 | $QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io |
| 449 | $QEMU_IO -c "read -P 0 $((size)) 512" "$TEST_IMG" | _filter_qemu_io |
| 450 | $QEMU_IO -c "read -P 1 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io |
| 451 | $QEMU_IO -c "read -P 0 $((size + 1024)) 1024" "$TEST_IMG" | _filter_qemu_io |
| 452 | $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map |
| 453 | |
| 454 | # success, all done |
| 455 | echo "*** done" |
| 456 | rm -f $seq.full |
| 457 | status=0 |