3 # Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
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/>.
22 owner
=kwolf@redhat.com
25 echo "QA output created by $seq"
29 status
=1 # failure is the default!
36 trap "_cleanup; exit \$status" 0 1 2 3 15
38 # get standard environment, filters and checks
46 # We test all cache modes anyway, but O_DIRECT needs to be supported
47 _default_cache_mode none
48 _supported_cache_modes none directsync
50 function do_run_qemu
()
60 ) |
$QEMU -nographic -monitor stdio
-nodefaults "$@"
66 do_run_qemu
"$@" 2>&1 | _filter_testdir | _filter_qemu
71 TEST_IMG
="$TEST_IMG.base" _make_test_img
$size
72 TEST_IMG
="$TEST_IMG.snap" _make_test_img
$size
73 _make_test_img
-b "$TEST_IMG.base" $size
76 echo === Simple
test for all cache modes
===
79 run_qemu
-drive file="$TEST_IMG",cache
=none
80 run_qemu
-drive file="$TEST_IMG",cache
=directsync
81 run_qemu
-drive file="$TEST_IMG",cache
=writeback
82 run_qemu
-drive file="$TEST_IMG",cache
=writethrough
83 run_qemu
-drive file="$TEST_IMG",cache
=unsafe
84 run_qemu
-drive file="$TEST_IMG",cache
=invalid_value
87 echo === Check inheritance of cache modes
===
90 files
="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
91 ids
="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
93 function check_cache_all
()
95 # cache.direct is supposed to be inherited by both bs->file and
98 echo -e "cache.direct=on on none0"
99 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",cache.direct
=on |
grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
100 echo -e "\ncache.direct=on on file"
101 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",file.cache.direct
=on |
grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
102 echo -e "\ncache.direct=on on backing"
103 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",backing.cache.direct
=on |
grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
104 echo -e "\ncache.direct=on on backing-file"
105 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",backing.
file.cache.direct
=on |
grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
107 # cache.writeback is supposed to be inherited by bs->backing; bs->file
108 # always gets cache.writeback=on
110 echo -e "\n\ncache.writeback=off on none0"
111 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",cache.writeback
=off |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
112 echo -e "\ncache.writeback=off on file"
113 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",file.cache.writeback
=off |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
114 echo -e "\ncache.writeback=off on backing"
115 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",backing.cache.writeback
=off |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
116 echo -e "\ncache.writeback=off on backing-file"
117 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",backing.
file.cache.writeback
=off |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
119 # cache.no-flush is supposed to be inherited by both bs->file and bs->backing
121 echo -e "\n\ncache.no-flush=on on none0"
122 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",cache.no-flush
=on |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
123 echo -e "\ncache.no-flush=on on file"
124 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",file.cache.no-flush
=on |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
125 echo -e "\ncache.no-flush=on on backing"
126 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids",backing.cache.no-flush
=on |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
127 echo -e "\ncache.no-flush=on on backing-file"
128 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"
132 echo "--- Configure cache modes on the command line ---"
135 # First check the inherited cache mode after opening the image.
137 hmp_cmds
="info block image
140 info block backing-file"
145 echo "--- Cache modes after reopen (live snapshot) ---"
148 # Then trigger a reopen and check that the cache modes are still the same.
150 hmp_cmds
="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
155 info block backing-file"
160 echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
163 # This one actually changes the cache mode with the reopen. For this test, the
164 # new cache mode is specified in the flags, not as an option.
166 hmp_cmds
='qemu-io none0 "reopen -c none"
170 info block backing-file'
175 echo "--- Change cache modes with reopen (qemu-io command, options) ---"
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.
181 hmp_cmds
='qemu-io none0 "reopen -o cache.direct=on"
185 info block backing-file'
190 echo "--- Change cache modes after snapshot ---"
193 # This checks that the original image doesn't inherit from the snapshot
195 hmp_cmds
="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
196 qemu-io none0 \"reopen -c none\"
201 info block backing-file"
206 echo "--- Change cache mode in parent, child has explicit option in JSON ---"
209 # This checks that children with options explicitly set by the json:
210 # pseudo-protocol don't inherit these options from their parents.
212 # Yes, blkdebug::json:... is criminal, but I can't see another way to have a
213 # BDS initialised with the json: pseudo-protocol, but still have it inherit
214 # options from its parent node.
216 hmp_cmds
="qemu-io none0 \"reopen -o cache.writeback=off,cache.direct=on,cache.no-flush=on\"
221 echo "$hmp_cmds" | run_qemu
-drive if=none
,file="blkdebug::json:{\"filename\":\"$TEST_IMG\",,\"cache\":{\"direct\":false}}",node-name
=image
,file.node-name
=blkdebug
,file.image.node-name
=file |
grep "Cache"
224 echo "=== Check that referenced BDSes don't inherit ==="
227 drv_bkfile
="if=none,driver=file,filename=$TEST_IMG.base,node-name=backing-file"
228 drv_bk
="if=none,file=json:{'driver':'$IMGFMT',,'file':'backing-file',,'node-name':'backing'}"
229 drv_file
="if=none,driver=file,filename=$TEST_IMG,node-name=file"
230 drv_img
="if=none,id=blk,file=json:{'driver':'$IMGFMT',,'file':'file',,'backing':'backing',,'node-name':'image'}"
232 function check_cache_all_separate
()
236 echo -e "cache.direct=on on blk"
237 echo "$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"
238 echo -e "\ncache.direct=on on file"
239 echo "$hmp_cmds" | run_qemu
-drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.direct
=on
-drive "$drv_img" |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
240 echo -e "\ncache.direct=on on backing"
241 echo "$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"
242 echo -e "\ncache.direct=on on backing-file"
243 echo "$hmp_cmds" | run_qemu
-drive "$drv_bkfile",cache.direct
=on
-drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
245 # Check cache.writeback
247 echo -e "\n\ncache.writeback=off on blk"
248 echo "$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"
249 echo -e "\ncache.writeback=off on file"
250 echo "$hmp_cmds" | run_qemu
-drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.writeback
=off
-drive "$drv_img" |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
251 echo -e "\ncache.writeback=off on backing"
252 echo "$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"
253 echo -e "\ncache.writeback=off on backing-file"
254 echo "$hmp_cmds" | run_qemu
-drive "$drv_bkfile",cache.writeback
=off
-drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
256 # Check cache.no-flush
258 echo -e "\n\ncache.no-flush=on on blk"
259 echo "$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"
260 echo -e "\ncache.no-flush=on on file"
261 echo "$hmp_cmds" | run_qemu
-drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.no-flush
=on
-drive "$drv_img" |
grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
262 echo -e "\ncache.no-flush=on on backing"
263 echo "$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"
264 echo -e "\ncache.no-flush=on on backing-file"
265 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"
269 echo "--- Configure cache modes on the command line ---"
272 # First check the inherited cache mode after opening the image.
274 hmp_cmds
="info block image
277 info block backing-file"
279 check_cache_all_separate
282 echo "--- Cache modes after reopen (live snapshot) ---"
285 # Then trigger a reopen and check that the cache modes are still the same.
287 hmp_cmds
="snapshot_blkdev -n blk $TEST_IMG.snap $IMGFMT
292 info block backing-file"
294 check_cache_all_separate
297 echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
300 # This one actually changes the cache mode with the reopen. For this test, the
301 # new cache mode is specified as flags, not as option.
303 hmp_cmds
='qemu-io blk "reopen -c none"
307 info block backing-file'
309 check_cache_all_separate
313 echo "=== Reopening children instead of the root ==="
316 files
="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
317 ids
="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
320 echo "--- Basic reopen ---"
323 hmp_cmds
='qemu-io none0 "reopen -o backing.cache.direct=on"
327 info block backing-file'
332 echo "--- Change cache mode after reopening child ---"
335 # This checks that children with options explicitly set with reopen don't
336 # inherit these options from their parents any more
338 # TODO Implement node-name support for 'qemu-io' HMP command for -c
339 # Can use only -o to access child node options for now
341 hmp_cmds
="qemu-io none0 \"reopen -o file.cache.direct=off,file.cache.no-flush=off\"
342 qemu-io none0 \"reopen -o backing.file.cache.direct=off,backing.file.cache.no-flush=on\"
343 qemu-io none0 \"reopen -c none\"
347 info block backing-file"
349 echo "$hmp_cmds" | run_qemu
-drive "$files","$ids" |
grep "Cache"