1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2021, BELLSOFT. All rights reserved.
4 * Copyright (c) International Business Machines Corp., 2001
5 */
6
7 /*\
8 * [Description]
9 *
10 * Testcase to check sched_getscheduler() returns correct return value.
11 *
12 * [Algorithm]
13 *
14 * Call sched_setcheduler() to set the scheduling policy of the current
15 * process. Then call sched_getscheduler() to ensure that this is same
16 * as what set by the previous call to sched_setscheduler().
17 *
18 * Use SCHED_RR, SCHED_FIFO, SCHED_OTHER as the scheduling policies for
19 * sched_setscheduler().
20 *
21 */
22
23 #include <errno.h>
24 #include <stdio.h>
25
26 #include "tst_test.h"
27 #include "tst_sched.h"
28
29 struct test_cases_t {
30 int priority;
31 int policy;
32 } tcases[] = {
33 {1, SCHED_RR},
34 {0, SCHED_OTHER},
35 {1, SCHED_FIFO}
36 };
37
run(unsigned int n)38 static void run(unsigned int n)
39 {
40 struct sched_variant *tv = &sched_variants[tst_variant];
41 struct test_cases_t *tc = &tcases[n];
42 struct sched_param p = { .sched_priority = tc->priority };
43
44 TST_EXP_PASS_SILENT(tv->sched_setscheduler(0, tc->policy, &p));
45
46 if (!TST_PASS)
47 return;
48
49 TEST(tv->sched_getscheduler(0));
50 if (TST_RET == tc->policy)
51 tst_res(TPASS, "got expected policy %d", tc->policy);
52 else
53 tst_res(TFAIL | TERRNO, "got policy %ld, expected %d", TST_RET, tc->policy);
54 }
55
setup(void)56 static void setup(void)
57 {
58 tst_res(TINFO, "Testing %s variant", sched_variants[tst_variant].desc);
59 }
60
61 static struct tst_test test = {
62 .needs_root = 1,
63 .setup = setup,
64 .test_variants = ARRAY_SIZE(sched_variants),
65 .tcnt = ARRAY_SIZE(tcases),
66 .test = run,
67 };
68