summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/cgroup/test_cpuset_prs.sh
blob: 186e1c26867ef5cacb95e1ea8fae6405018b5ed2 (plain)
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Test for cpuset v2 partition root state (PRS)
#
# The sched verbose flag is set, if available, so that the console log
# can be examined for the correct setting of scheduling domain.
#

skip_test() {
	echo "$1"
	echo "Test SKIPPED"
	exit 0
}

[[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!"

# Set sched verbose flag, if available
if [[ -d /sys/kernel/debug/sched ]]
then
	# Used to restore the original setting during cleanup
	SCHED_DEBUG=$(cat /sys/kernel/debug/sched/verbose)
	echo Y > /sys/kernel/debug/sched/verbose
fi

# Get wait_inotify location
WAIT_INOTIFY=$(cd $(dirname $0); pwd)/wait_inotify

# Find cgroup v2 mount point
CGROUP2=$(mount -t cgroup2 | head -1 | awk -e '{print $3}')
[[ -n "$CGROUP2" ]] || skip_test "Cgroup v2 mount point not found!"

CPUS=$(lscpu | grep "^CPU(s):" | sed -e "s/.*:[[:space:]]*//")
[[ $CPUS -lt 8 ]] && skip_test "Test needs at least 8 cpus available!"

# Set verbose flag and delay factor
PROG=$1
VERBOSE=
DELAY_FACTOR=1
while [[ "$1" = -* ]]
do
	case "$1" in
		-v) VERBOSE=1
		    break
		    ;;
		-d) DELAY_FACTOR=$2
		    shift
		    break
		    ;;
		*)  echo "Usage: $PROG [-v] [-d <delay-factor>"
		    exit
		    ;;
	esac
	shift
done

cd $CGROUP2
echo +cpuset > cgroup.subtree_control
[[ -d test ]] || mkdir test
cd test

cleanup()
{
	online_cpus
	rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1
	cd ..
	rmdir test > /dev/null 2>&1
	echo "$SCHED_DEBUG" > /sys/kernel/debug/sched/verbose
}

# Pause in ms
pause()
{
	DELAY=$1
	LOOP=0
	while [[ $LOOP -lt $DELAY_FACTOR ]]
	do
		sleep $DELAY
		((LOOP++))
	done
	return 0
}

console_msg()
{
	MSG=$1
	echo "$MSG"
	echo "" > /dev/console
	echo "$MSG" > /dev/console
	pause 0.01
}

test_partition()
{
	EXPECTED_VAL=$1
	echo $EXPECTED_VAL > cpuset.cpus.partition
	[[ $? -eq 0 ]] || exit 1
	ACTUAL_VAL=$(cat cpuset.cpus.partition)
	[[ $ACTUAL_VAL != $EXPECTED_VAL ]] && {
		echo "cpuset.cpus.partition: expect $EXPECTED_VAL, found $EXPECTED_VAL"
		echo "Test FAILED"
		exit 1
	}
}

test_effective_cpus()
{
	EXPECTED_VAL=$1
	ACTUAL_VAL=$(cat cpuset.cpus.effective)
	[[ "$ACTUAL_VAL" != "$EXPECTED_VAL" ]] && {
		echo "cpuset.cpus.effective: expect '$EXPECTED_VAL', found '$EXPECTED_VAL'"
		echo "Test FAILED"
		exit 1
	}
}

# Adding current process to cgroup.procs as a test
test_add_proc()
{
	OUTSTR="$1"
	ERRMSG=$((echo $$ > cgroup.procs) |& cat)
	echo $ERRMSG | grep -q "$OUTSTR"
	[[ $? -ne 0 ]] && {
		echo "cgroup.procs: expect '$OUTSTR', got '$ERRMSG'"
		echo "Test FAILED"
		exit 1
	}
	echo $$ > $CGROUP2/cgroup.procs	# Move out the task
}

#
# Testing the new "isolated" partition root type
#
test_isolated()
{
	echo 2-3 > cpuset.cpus
	TYPE=$(cat cpuset.cpus.partition)
	[[ $TYPE = member ]] || echo member > cpuset.cpus.partition

	console_msg "Change from member to root"
	test_partition root

	console_msg "Change from root to isolated"
	test_partition isolated

	console_msg "Change from isolated to member"
	test_partition member

	console_msg "Change from member to isolated"
	test_partition isolated

	console_msg "Change from isolated to root"
	test_partition root

	console_msg "Change from root to member"
	test_partition member

	#
	# Testing partition root with no cpu
	#
	console_msg "Distribute all cpus to child partition"
	echo +cpuset > cgroup.subtree_control
	test_partition root

	mkdir A1
	cd A1
	echo 2-3 > cpuset.cpus
	test_partition root
	test_effective_cpus 2-3
	cd ..
	test_effective_cpus ""

	console_msg "Moving task to partition test"
	test_add_proc "No space left"
	cd A1
	test_add_proc ""
	cd ..

	console_msg "Shrink and expand child partition"
	cd A1
	echo 2 > cpuset.cpus
	cd ..
	test_effective_cpus 3
	cd A1
	echo 2-3 > cpuset.cpus
	cd ..
	test_effective_cpus ""

	# Cleaning up
	console_msg "Cleaning up"
	echo $$ > $CGROUP2/cgroup.procs
	[[ -d A1 ]] && rmdir A1
}

#
# Cpuset controller state transition test matrix.
#
# Cgroup test hierarchy
#
# test -- A1 -- A2 -- A3
#      \- B1
#
#  P<v> = set cpus.partition (0:member, 1:root, 2:isolated, -1:root invalid)
#  C<l> = add cpu-list
#  S<p> = use prefix in subtree_control
#  T    = put a task into cgroup
#  O<c>-<v> = Write <v> to CPU online file of <c>
#
SETUP_A123_PARTITIONS="C1-3:P1:S+ C2-3:P1:S+ C3:P1"
TEST_MATRIX=(
	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	"  S+    C0-1     .      .    C2-3    S+    C4-5     .      .     0 A2:0-1"
	"  S+    C0-1     .      .    C2-3    P1      .      .      .     0 "
	"  S+    C0-1     .      .    C2-3   P1:S+ C0-1:P1   .      .     0 "
	"  S+    C0-1     .      .    C2-3   P1:S+  C1:P1    .      .     0 "
	"  S+   C0-1:S+   .      .    C2-3     .      .      .     P1     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+     C1      .      .     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+    C1:P1    .      .     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+    C1:P1    .     P1     0 "
	"  S+   C0-1:P1   .      .    C2-3   C4-5     .      .      .     0 A1:4-5"
	"  S+   C0-1:P1   .      .    C2-3  S+:C4-5   .      .      .     0 A1:4-5"
	"  S+    C0-1     .      .   C2-3:P1   .      .      .     C2     0 "
	"  S+    C0-1     .      .   C2-3:P1   .      .      .    C4-5    0 B1:4-5"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .      .      .      .      .     0 A1:0-1,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     C1-3    .      .      .     0 A1:1,A2:2-3"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      .      .      .     0 A1:,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      P0     .      .     0 A1:3,A2:3 A1:P1,A2:P0"
	"  S+ C2-3:P1:S+  C2:P1  .      .     C2-4    .      .      .     0 A1:3-4,A2:2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      .      .     C0-2   0 A1:,B1:0-2 A1:P1,A2:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     C2-3    .      .      .     0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"

	# CPU offlining cases:
	"  S+    C0-1     .      .    C2-3    S+    C4-5     .     O2-0   0 A1:0-1,B1:3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O2-0    .      .      .     0 A1:0-1,A2:3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O2-0   O2-1    .      .     0 A1:0-1,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O1-0    .      .      .     0 A1:0,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O1-0   O1-1    .      .     0 A1:0-1,A2:2-3"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O3-0   O3-1    .      .     0 A1:2,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P2  .      .     O3-0   O3-1    .      .     0 A1:2,A2:3 A1:P1,A2:P2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O2-0   O2-1    .      .     0 A1:2,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P2  .      .     O2-0   O2-1    .      .     0 A1:2,A2:3 A1:P1,A2:P2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O2-0    .      .      .     0 A1:,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O3-0    .      .      .     0 A1:2,A2: A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .    T:O2-0   .      .      .     0 A1:3,A2:3 A1:P1,A2:P-1"
	"  S+ C2-3:P1:S+  C3:P1  .      .      .    T:O3-0   .      .     0 A1:2,A2:2 A1:P1,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .     O1-0    .      .      .     0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     O2-0    .      .      .     0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     O3-0    .      .      .     0 A1:1,A2:2,A3: A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0   .      .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .      .    T:O2-0   .      .     0 A1:1,A2:3,A3:3 A1:P1,A2:P1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .      .      .    T:O3-0   .     0 A1:1,A2:2,A3:2 A1:P1,A2:P1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O1-1    .      .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .      .    T:O2-0  O2-1    .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .      .      .    T:O3-0  O3-1   0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O2-0   O1-1    .     0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O2-0   O2-1    .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"

	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	#
	# Incorrect change to cpuset.cpus invalidates partition root
	#
	# Adding CPUs to partition root that are not in parent's
	# cpuset.cpus is allowed, but those extra CPUs are ignored.
	"  S+ C2-3:P1:S+ C3:P1   .      .      .     C2-4    .      .     0 A1:,A2:2-3 A1:P1,A2:P1"

	# Taking away all CPUs from parent or itself if there are tasks
	# will make the partition invalid.
	"  S+ C2-3:P1:S+  C3:P1  .      .      T     C2-3    .      .     0 A1:2-3,A2:2-3 A1:P1,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:C2-3   .      .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    . T:C2-3:C1-3 .      .      .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"

	# Changing a partition root to member makes child partitions invalid
	"  S+ C2-3:P1:S+  C3:P1  .      .      P0     .      .      .     0 A1:2-3,A2:3 A1:P0,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .     C2-3    P0     .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P0,A3:P-1"

	# cpuset.cpus can contains cpus not in parent's cpuset.cpus as long
	# as they overlap.
	"  S+ C2-3:P1:S+  .      .      .      .   C3-4:P1   .      .     0 A1:2,A2:3 A1:P1,A2:P1"

	# Deletion of CPUs distributed to child cgroup is allowed.
	"  S+ C0-1:P1:S+ C1      .    C2-3   C4-5     .      .      .     0 A1:4-5,A2:4-5"

	# To become a valid partition root, cpuset.cpus must overlap parent's
	# cpuset.cpus.
	"  S+   C0-1:P1   .      .    C2-3    S+   C4-5:P1   .      .     0 A1:0-1,A2:0-1 A1:P1,A2:P-1"

	# Enabling partition with child cpusets is allowed
	"  S+   C0-1:S+  C1      .    C2-3    P1      .      .      .     0 A1:0-1,A2:1 A1:P1"

	# A partition root with non-partition root parent is invalid, but it
	# can be made valid if its parent becomes a partition root too.
	"  S+   C0-1:S+  C1      .    C2-3     .      P2     .      .     0 A1:0-1,A2:1 A1:P0,A2:P-2"
	"  S+   C0-1:S+ C1:P2    .    C2-3     P1     .      .      .     0 A1:0,A2:1 A1:P1,A2:P2"

	# A non-exclusive cpuset.cpus change will invalidate partition and its siblings
	"  S+   C0-1:P1   .      .    C2-3   C0-2     .      .      .     0 A1:0-2,B1:2-3 A1:P-1,B1:P0"
	"  S+   C0-1:P1   .      .  P1:C2-3  C0-2   .      .      .     0 A1:0-2,B1:2-3 A1:P-1,B1:P-1"
	"  S+    C0-1     .      .  P1:C2-3  C0-2   .      .      .     0 A1:0-2,B1:2-3 A1:P0,B1:P-1"

	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	# Failure cases:

	# A task cannot be added to a partition with no cpu
	"  S+ C2-3:P1:S+  C3:P1  .      .    O2-0:T   .      .      .     1 A1:,A2:3 A1:P1,A2:P1"
)

#
# Write to the cpu online file
#  $1 - <c>-<v> where <c> = cpu number, <v> value to be written
#
write_cpu_online()
{
	CPU=${1%-*}
	VAL=${1#*-}
	CPUFILE=//sys/devices/system/cpu/cpu${CPU}/online
	if [[ $VAL -eq 0 ]]
	then
		OFFLINE_CPUS="$OFFLINE_CPUS $CPU"
	else
		[[ -n "$OFFLINE_CPUS" ]] && {
			OFFLINE_CPUS=$(echo $CPU $CPU $OFFLINE_CPUS | fmt -1 |\
					sort | uniq -u)
		}
	fi
	echo $VAL > $CPUFILE
	pause 0.01
}

#
# Set controller state
#  $1 - cgroup directory
#  $2 - state
#  $3 - showerr
#
# The presence of ":" in state means transition from one to the next.
#
set_ctrl_state()
{
	TMPMSG=/tmp/.msg_$$
	CGRP=$1
	STATE=$2
	SHOWERR=${3}${VERBOSE}
	CTRL=${CTRL:=$CONTROLLER}
	HASERR=0
	REDIRECT="2> $TMPMSG"
	[[ -z "$STATE" || "$STATE" = '.' ]] && return 0

	rm -f $TMPMSG
	for CMD in $(echo $STATE | sed -e "s/:/ /g")
	do
		TFILE=$CGRP/cgroup.procs
		SFILE=$CGRP/cgroup.subtree_control
		PFILE=$CGRP/cpuset.cpus.partition
		CFILE=$CGRP/cpuset.cpus
		S=$(expr substr $CMD 1 1)
		if [[ $S = S ]]
		then
			PREFIX=${CMD#?}
			COMM="echo ${PREFIX}${CTRL} > $SFILE"
			eval $COMM $REDIRECT
		elif [[ $S = C ]]
		then
			CPUS=${CMD#?}
			COMM="echo $CPUS > $CFILE"
			eval $COMM $REDIRECT
		elif [[ $S = P ]]
		then
			VAL=${CMD#?}
			case $VAL in
			0)  VAL=member
			    ;;
			1)  VAL=root
			    ;;
			2)  VAL=isolated
			    ;;
			*)
			    echo "Invalid partition state - $VAL"
			    exit 1
			    ;;
			esac
			COMM="echo $VAL > $PFILE"
			eval $COMM $REDIRECT
		elif [[ $S = O ]]
		then
			VAL=${CMD#?}
			write_cpu_online $VAL
		elif [[ $S = T ]]
		then
			COMM="echo 0 > $TFILE"
			eval $COMM $REDIRECT
		fi
		RET=$?
		[[ $RET -ne 0 ]] && {
			[[ -n "$SHOWERR" ]] && {
				echo "$COMM"
				cat $TMPMSG
			}
			HASERR=1
		}
		pause 0.01
		rm -f $TMPMSG
	done
	return $HASERR
}

set_ctrl_state_noerr()
{
	CGRP=$1
	STATE=$2
	[[ -d $CGRP ]] || mkdir $CGRP
	set_ctrl_state $CGRP $STATE 1
	[[ $? -ne 0 ]] && {
		echo "ERROR: Failed to set $2 to cgroup $1!"
		exit 1
	}
}

online_cpus()
{
	[[ -n "OFFLINE_CPUS" ]] && {
		for C in $OFFLINE_CPUS
		do
			write_cpu_online ${C}-1
		done
	}
}

#
# Return 1 if the list of effective cpus isn't the same as the initial list.
#
reset_cgroup_states()
{
	echo 0 > $CGROUP2/cgroup.procs
	online_cpus
	rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1
	set_ctrl_state . S-
	pause 0.01
}

dump_states()
{
	for DIR in A1 A1/A2 A1/A2/A3 B1
	do
		ECPUS=$DIR/cpuset.cpus.effective
		PRS=$DIR/cpuset.cpus.partition
		[[ -e $ECPUS ]] && echo "$ECPUS: $(cat $ECPUS)"
		[[ -e $PRS   ]] && echo "$PRS: $(cat $PRS)"
	done
}

#
# Check effective cpus
# $1 - check string, format: <cgroup>:<cpu-list>[,<cgroup>:<cpu-list>]*
#
check_effective_cpus()
{
	CHK_STR=$1
	for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
	do
		set -- $(echo $CHK | sed -e "s/:/ /g")
		CGRP=$1
		CPUS=$2
		[[ $CGRP = A2 ]] && CGRP=A1/A2
		[[ $CGRP = A3 ]] && CGRP=A1/A2/A3
		FILE=$CGRP/cpuset.cpus.effective
		[[ -e $FILE ]] || return 1
		[[ $CPUS = $(cat $FILE) ]] || return 1
	done
}

#
# Check cgroup states
#  $1 - check string, format: <cgroup>:<state>[,<cgroup>:<state>]*
#
check_cgroup_states()
{
	CHK_STR=$1
	for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
	do
		set -- $(echo $CHK | sed -e "s/:/ /g")
		CGRP=$1
		STATE=$2
		FILE=
		EVAL=$(expr substr $STATE 2 2)
		[[ $CGRP = A2 ]] && CGRP=A1/A2
		[[ $CGRP = A3 ]] && CGRP=A1/A2/A3

		case $STATE in
			P*) FILE=$CGRP/cpuset.cpus.partition
			    ;;
			*)  echo "Unknown state: $STATE!"
			    exit 1
			    ;;
		esac
		VAL=$(cat $FILE)

		case "$VAL" in
			member) VAL=0
				;;
			root)	VAL=1
				;;
			isolated)
				VAL=2
				;;
			"root invalid"*)
				VAL=-1
				;;
			"isolated invalid"*)
				VAL=-2
				;;
		esac
		[[ $EVAL != $VAL ]] && return 1
	done
	return 0
}

#
# Run cpuset state transition test
#  $1 - test matrix name
#
# This test is somewhat fragile as delays (sleep x) are added in various
# places to make sure state changes are fully propagated before the next
# action. These delays may need to be adjusted if running in a slower machine.
#
run_state_test()
{
	TEST=$1
	CONTROLLER=cpuset
	CPULIST=0-6
	I=0
	eval CNT="\${#$TEST[@]}"

	reset_cgroup_states
	echo $CPULIST > cpuset.cpus
	echo root > cpuset.cpus.partition
	console_msg "Running state transition test ..."

	while [[ $I -lt $CNT ]]
	do
		echo "Running test $I ..." > /dev/console
		eval set -- "\${$TEST[$I]}"
		ROOT=$1
		OLD_A1=$2
		OLD_A2=$3
		OLD_A3=$4
		OLD_B1=$5
		NEW_A1=$6
		NEW_A2=$7
		NEW_A3=$8
		NEW_B1=$9
		RESULT=${10}
		ECPUS=${11}
		STATES=${12}

		set_ctrl_state_noerr .        $ROOT
		set_ctrl_state_noerr A1       $OLD_A1
		set_ctrl_state_noerr A1/A2    $OLD_A2
		set_ctrl_state_noerr A1/A2/A3 $OLD_A3
		set_ctrl_state_noerr B1       $OLD_B1
		RETVAL=0
		set_ctrl_state A1       $NEW_A1; ((RETVAL += $?))
		set_ctrl_state A1/A2    $NEW_A2; ((RETVAL += $?))
		set_ctrl_state A1/A2/A3 $NEW_A3; ((RETVAL += $?))
		set_ctrl_state B1       $NEW_B1; ((RETVAL += $?))

		[[ $RETVAL -ne $RESULT ]] && {
			echo "Test $TEST[$I] failed result check!"
			eval echo \"\${$TEST[$I]}\"
			dump_states
			online_cpus
			exit 1
		}

		[[ -n "$ECPUS" && "$ECPUS" != . ]] && {
			check_effective_cpus $ECPUS
			[[ $? -ne 0 ]] && {
				echo "Test $TEST[$I] failed effective CPU check!"
				eval echo \"\${$TEST[$I]}\"
				echo
				dump_states
				online_cpus
				exit 1
			}
		}

		[[ -n "$STATES" ]] && {
			check_cgroup_states $STATES
			[[ $? -ne 0 ]] && {
				echo "FAILED: Test $TEST[$I] failed states check!"
				eval echo \"\${$TEST[$I]}\"
				echo
				dump_states
				online_cpus
				exit 1
			}
		}

		reset_cgroup_states
		#
		# Check to see if effective cpu list changes
		#
		pause 0.05
		NEWLIST=$(cat cpuset.cpus.effective)
		[[ $NEWLIST != $CPULIST ]] && {
			echo "Effective cpus changed to $NEWLIST after test $I!"
			exit 1
		}
		[[ -n "$VERBOSE" ]] && echo "Test $I done."
		((I++))
	done
	echo "All $I tests of $TEST PASSED."

	echo member > cpuset.cpus.partition
}

#
# Wait for inotify event for the given file and read it
# $1: cgroup file to wait for
# $2: file to store the read result
#
wait_inotify()
{
	CGROUP_FILE=$1
	OUTPUT_FILE=$2

	$WAIT_INOTIFY $CGROUP_FILE
	cat $CGROUP_FILE > $OUTPUT_FILE
}

#
# Test if inotify events are properly generated when going into and out of
# invalid partition state.
#
test_inotify()
{
	ERR=0
	PRS=/tmp/.prs_$$
	[[ -f $WAIT_INOTIFY ]] || {
		echo "wait_inotify not found, inotify test SKIPPED."
		return
	}

	pause 0.01
	echo 1 > cpuset.cpus
	echo 0 > cgroup.procs
	echo root > cpuset.cpus.partition
	pause 0.01
	rm -f $PRS
	wait_inotify $PWD/cpuset.cpus.partition $PRS &
	pause 0.01
	set_ctrl_state . "O1-0"
	pause 0.01
	check_cgroup_states ".:P-1"
	if [[ $? -ne 0 ]]
	then
		echo "FAILED: Inotify test - partition not invalid"
		ERR=1
	elif [[ ! -f $PRS ]]
	then
		echo "FAILED: Inotify test - event not generated"
		ERR=1
		kill %1
	elif [[ $(cat $PRS) != "root invalid"* ]]
	then
		echo "FAILED: Inotify test - incorrect state"
		cat $PRS
		ERR=1
	fi
	online_cpus
	echo member > cpuset.cpus.partition
	echo 0 > ../cgroup.procs
	if [[ $ERR -ne 0 ]]
	then
		exit 1
	else
		echo "Inotify test PASSED"
	fi
}

trap cleanup 0 2 3 6
run_state_test TEST_MATRIX
test_isolated
test_inotify
echo "All tests PASSED."
cd ..
rmdir test