1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
4 */
5
6/*\
7 * [Description]
8 *
9 * Verify that:
10 *
11 * sched_getparam(2) gets correct scheduling parameters for
12 * the specified process:
13 *
14 * - If pid is zero, sched_getparam(2) gets the scheduling parameters
15 * for the calling process.
16 * - If pid is not zero, sched_getparam(2) gets the scheduling
17 * parameters for the specified [pid] process.
18 */
19
20#include <errno.h>
21#include <stdlib.h>
22#include <sys/types.h>
23#include <unistd.h>
24#include "tst_test.h"
25#include "tst_sched.h"
26
27static pid_t pids[2] = {0, 0};
28
29static void verify_sched_getparam(unsigned int n)
30{
31	pid_t child_pid;
32	struct sched_variant *tv = &sched_variants[tst_variant];
33	struct sched_param param = {
34		.sched_priority = 100,
35	};
36
37	child_pid = SAFE_FORK();
38	if (!child_pid) {
39		TST_EXP_PASS_SILENT(tv->sched_getparam(pids[n], &param),
40				   "sched_getparam(%d)", pids[n]);
41		if (!TST_PASS)
42			exit(0);
43
44		/*
45		 * For normal process, scheduling policy is SCHED_OTHER.
46		 * For this scheduling policy, only allowed priority value is 0.
47		 */
48		if (param.sched_priority)
49			tst_res(TFAIL,
50				"sched_getparam(%d) got wrong sched_priority %d, expected 0",
51				pids[n], param.sched_priority);
52		else
53			tst_res(TPASS, "sched_getparam(%d) got expected sched_priority 0", pids[n]);
54
55		exit(0);
56	}
57
58	tst_reap_children();
59}
60
61static void setup(void)
62{
63	struct sched_variant *tv = &sched_variants[tst_variant];
64
65	tst_res(TINFO, "Testing %s variant", tv->desc);
66
67	pids[1] = getpid();
68}
69
70static struct tst_test test = {
71	.forks_child = 1,
72	.setup = setup,
73	.test_variants = ARRAY_SIZE(sched_variants),
74	.tcnt = ARRAY_SIZE(pids),
75	.test = verify_sched_getparam,
76};
77