tests/qemu-iotests/142

   1 #!/usr/bin/env bash
   2 #
   3 # Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
   4 #
   5 # Copyright (C) 2015 Red Hat, Inc.
   6 #
   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.
  11 #
  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.
  16 #
  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/>.
  19 #
  20
  21 # creator
  22 owner=kwolf@redhat.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32     rm -f $TEST_IMG.snap
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39
  40 _supported_fmt qcow2
  41 _supported_proto file
  42 _supported_os Linux
  43
  44 # We test all cache modes anyway, but O_DIRECT needs to be supported
  45 _default_cache_mode none
  46 _supported_cache_modes none directsync
  47
  48 do_run_qemu()
  49 {
  50     echo Testing: "$@"
  51     (
  52         if ! test -t 0; then
  53             while read cmd; do
  54                 echo $cmd
  55             done
  56         fi
  57         echo quit
  58     ) | $QEMU -nographic -monitor stdio -nodefaults "$@"
  59     echo
  60 }
  61
  62 run_qemu()
  63 {
  64     do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_hmp
  65 }
  66
  67 size=128M
  68
  69 TEST_IMG="$TEST_IMG.base" _make_test_img $size
  70 TEST_IMG="$TEST_IMG.snap" _make_test_img $size
  71 _make_test_img -b "$TEST_IMG.base" $size
  72
  73 echo
  74 echo === Simple test for all cache modes ===
  75 echo
  76
  77 run_qemu -drive file="$TEST_IMG",cache=none
  78 run_qemu -drive file="$TEST_IMG",cache=directsync
  79 run_qemu -drive file="$TEST_IMG",cache=writeback
  80 run_qemu -drive file="$TEST_IMG",cache=writethrough
  81 run_qemu -drive file="$TEST_IMG",cache=unsafe
  82 run_qemu -drive file="$TEST_IMG",cache=invalid_value
  83
  84 echo
  85 echo === Check inheritance of cache modes ===
  86 echo
  87
  88 files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
  89 ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
  90
  91 check_cache_all()
  92 {
  93     # cache.direct is supposed to be inherited by both bs->file and
  94     # bs->backing
  95
  96     printf "cache.direct=on on none0\n"
  97     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
  98     printf "\ncache.direct=on on file\n"
  99     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
 100     printf "\ncache.direct=on on backing\n"
 101     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
 102     printf "\ncache.direct=on on backing-file\n"
 103     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
 104
 105     # cache.writeback is supposed to be inherited by bs->backing; bs->file
 106     # always gets cache.writeback=on
 107
 108     printf "\n\ncache.writeback=off on none0\n"
 109     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.writeback=off | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 110     printf "\ncache.writeback=off on file\n"
 111     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.writeback=off | grep -e "doesn't" -e "does not"
 112     printf "\ncache.writeback=off on backing\n"
 113     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.writeback=off | grep -e "doesn't" -e "does not"
 114     printf "\ncache.writeback=off on backing-file\n"
 115     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.writeback=off | grep -e "doesn't" -e "does not"
 116
 117     # cache.no-flush is supposed to be inherited by both bs->file and bs->backing
 118
 119     printf "\n\ncache.no-flush=on on none0\n"
 120     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 121     printf "\ncache.no-flush=on on file\n"
 122     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 123     printf "\ncache.no-flush=on on backing\n"
 124     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 125     printf "\ncache.no-flush=on on backing-file\n"
 126     echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 127 }
 128
 129 echo
 130 echo "--- Configure cache modes on the command line ---"
 131 echo
 132
 133 # First check the inherited cache mode after opening the image.
 134
 135 hmp_cmds="info block none0
 136 info block image
 137 info block file
 138 info block backing
 139 info block backing-file"
 140
 141 check_cache_all
 142
 143 echo
 144 echo "--- Cache modes after reopen (live snapshot) ---"
 145 echo
 146
 147 # Then trigger a reopen and check that the cache modes are still the same.
 148
 149 hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
 150 info block
 151 info block image
 152 info block file
 153 info block backing
 154 info block backing-file"
 155
 156 check_cache_all
 157
 158 echo
 159 echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
 160 echo
 161
 162 # This one actually changes the cache mode with the reopen. For this test, the
 163 # new cache mode is specified in the flags, not as an option.
 164
 165 hmp_cmds='qemu-io none0 "reopen -c none"
 166 info block none0
 167 info block image
 168 info block file
 169 info block backing
 170 info block backing-file'
 171
 172 check_cache_all
 173
 174 echo
 175 echo "--- Change cache modes with reopen (qemu-io command, options) ---"
 176 echo
 177
 178 # This one actually changes the cache mode with the reopen. For this test, the
 179 # new cache mode is specified as an option, not in the flags.
 180
 181 hmp_cmds='qemu-io none0 "reopen -o cache.direct=on"
 182 info block none0
 183 info block image
 184 info block file
 185 info block backing
 186 info block backing-file'
 187
 188 check_cache_all
 189
 190 echo
 191 echo "--- Change cache modes after snapshot ---"
 192 echo
 193
 194 # This checks that the original image doesn't inherit from the snapshot
 195
 196 hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
 197 qemu-io none0 \"reopen -c none\"
 198 info block none0
 199 info block image
 200 info block file
 201 info block backing
 202 info block backing-file"
 203
 204 check_cache_all
 205
 206 echo
 207 echo "--- Change cache mode in parent, child has explicit option in JSON ---"
 208 echo
 209
 210 # This checks that children with options explicitly set by the json:
 211 # pseudo-protocol don't inherit these options from their parents.
 212 #
 213 # Yes, blkdebug::json:... is criminal, but I can't see another way to have a
 214 # BDS initialised with the json: pseudo-protocol, but still have it inherit
 215 # options from its parent node.
 216
 217 hmp_cmds="qemu-io none0 \"reopen -o cache.direct=on,cache.no-flush=on\"
 218 info block none0
 219 info block image
 220 info block blkdebug
 221 info block file"
 222
 223 echo "$hmp_cmds" | run_qemu -drive if=none,file="blkdebug::json:{\"filename\":\"$TEST_IMG\",,\"cache\":{\"direct\":false}}",node-name=image,file.node-name=blkdebug,file.image.node-name=file | grep "Cache"
 224
 225 echo
 226 echo "=== Check that referenced BDSes don't inherit ==="
 227 echo
 228
 229 drv_bkfile="if=none,driver=file,filename=$TEST_IMG.base,node-name=backing-file"
 230 drv_bk="if=none,file=json:{'driver':'$IMGFMT',,'file':'backing-file',,'node-name':'backing'}"
 231 drv_file="if=none,driver=file,filename=$TEST_IMG,node-name=file"
 232 drv_img="if=none,id=blk,file=json:{'driver':'$IMGFMT',,'file':'file',,'backing':'backing',,'node-name':'image'}"
 233
 234 check_cache_all_separate()
 235 {
 236     # Check cache.direct
 237
 238     printf "cache.direct=on on blk\n"
 239     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.direct=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 240     printf "\ncache.direct=on on file\n"
 241     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.direct=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 242     printf "\ncache.direct=on on backing\n"
 243     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.direct=on -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 244     printf "\ncache.direct=on on backing-file\n"
 245     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.direct=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 246
 247     # Check cache.writeback
 248
 249     printf "\n\ncache.writeback=off on blk\n"
 250     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.writeback=off | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 251     printf "\ncache.writeback=off on file\n"
 252     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.writeback=off -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 253     printf "\ncache.writeback=off on backing\n"
 254     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.writeback=off -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 255     printf "\ncache.writeback=off on backing-file\n"
 256     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.writeback=off -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 257
 258     # Check cache.no-flush
 259
 260     printf "\n\ncache.no-flush=on on blk\n"
 261     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 262     printf "\ncache.no-flush=on on file\n"
 263     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.no-flush=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 264     printf "\ncache.no-flush=on on backing\n"
 265     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.no-flush=on -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 266     printf "\ncache.no-flush=on on backing-file\n"
 267     echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.no-flush=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
 268 }
 269
 270 echo
 271 echo "--- Configure cache modes on the command line ---"
 272 echo
 273
 274 # First check the inherited cache mode after opening the image.
 275
 276 hmp_cmds="info block image
 277 info block file
 278 info block backing
 279 info block backing-file"
 280
 281 check_cache_all_separate
 282
 283 echo
 284 echo "--- Cache modes after reopen (live snapshot) ---"
 285 echo
 286
 287 # Then trigger a reopen and check that the cache modes are still the same.
 288
 289 hmp_cmds="snapshot_blkdev -n blk $TEST_IMG.snap $IMGFMT
 290 info block blk
 291 info block image
 292 info block file
 293 info block backing
 294 info block backing-file"
 295
 296 check_cache_all_separate
 297
 298 echo
 299 echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
 300 echo
 301
 302 # This one actually changes the cache mode with the reopen. For this test, the
 303 # new cache mode is specified as flags, not as option.
 304
 305 hmp_cmds='qemu-io blk "reopen -c none"
 306 info block image
 307 info block file
 308 info block backing
 309 info block backing-file'
 310
 311 check_cache_all_separate
 312
 313
 314 echo
 315 echo "=== Reopening children instead of the root ==="
 316 echo
 317
 318 files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
 319 ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
 320
 321 echo
 322 echo "--- Basic reopen ---"
 323 echo
 324
 325 hmp_cmds='qemu-io none0 "reopen -o backing.cache.direct=on"
 326 info block none0
 327 info block image
 328 info block file
 329 info block backing
 330 info block backing-file'
 331
 332 check_cache_all
 333
 334 echo
 335 echo "--- Change cache mode after reopening child ---"
 336 echo
 337
 338 # This checks that children with options explicitly set with reopen don't
 339 # inherit these options from their parents any more
 340
 341 # TODO Implement node-name support for 'qemu-io' HMP command for -c
 342 # Can use only -o to access child node options for now
 343
 344 hmp_cmds="qemu-io none0 \"reopen -o file.cache.direct=off,file.cache.no-flush=off\"
 345 qemu-io none0 \"reopen -o backing.file.cache.direct=off,backing.file.cache.no-flush=on\"
 346 qemu-io none0 \"reopen -c none\"
 347 info block image
 348 info block file
 349 info block backing
 350 info block backing-file"
 351
 352 echo "$hmp_cmds" | run_qemu -drive "$files","$ids" | grep "Cache"
 353
 354 # success, all done
 355 echo "*** done"
 356 rm -f $seq.full
 357 status=0