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 test whether sched_setscheduler(2) sets the errnos
11 * correctly.
12 *
13 * [Algorithm]
14 *
15 * 1. Call sched_setscheduler with an invalid pid, and expect
16 * ESRCH to be returned.
17 * 2. Call sched_setscheduler with an invalid scheduling policy,
18 * and expect EINVAL to be returned.
19 * 3. Call sched_setscheduler with an invalid "param" address,
20 * which lies outside the address space of the process, and expect
21 * EFAULT to be returned.
22 * 4. Call sched_setscheduler with an invalid priority value
23 * in "param" and expect EINVAL to be returned
24 */
25
26 #include <stdio.h>
27 #include <errno.h>
28 #include <pwd.h>
29
30 #include "tst_test.h"
31 #include "tst_sched.h"
32
33 #define SCHED_INVALID 99
34
35 static struct sched_param p;
36 static struct sched_param p1 = { .sched_priority = 1 };
37 static pid_t unused_pid;
38 static pid_t init_pid = 1;
39 static pid_t zero_pid;
40
41 struct test_cases_t {
42 pid_t *pid;
43 int policy;
44 struct sched_param *p;
45 int error;
46 } tcases[] = {
47 /* The pid is invalid - ESRCH */
48 {&unused_pid, SCHED_OTHER, &p, ESRCH},
49 /* The policy is invalid - EINVAL */
50 {&init_pid, SCHED_INVALID, &p, EINVAL},
51 /* The param address is invalid - EFAULT */
52 {&init_pid, SCHED_OTHER, (struct sched_param *)-1, EFAULT},
53 /* The priority value in param invalid - EINVAL */
54 {&zero_pid, SCHED_OTHER, &p1, EINVAL}
55 };
56
setup(void)57 static void setup(void)
58 {
59 tst_res(TINFO, "Testing %s variant", sched_variants[tst_variant].desc);
60
61 unused_pid = tst_get_unused_pid();
62 }
63
run(unsigned int n)64 static void run(unsigned int n)
65 {
66 struct sched_variant *tv = &sched_variants[tst_variant];
67 struct test_cases_t *tc = &tcases[n];
68
69 TST_EXP_FAIL(tv->sched_setscheduler(*tc->pid, tc->policy, tc->p),
70 tc->error, "sched_setscheduler(%d, %d, %p)",
71 *tc->pid, tc->policy, tc->p);
72 }
73
74 static struct tst_test test = {
75 .setup = setup,
76 .test_variants = ARRAY_SIZE(sched_variants),
77 .tcnt = ARRAY_SIZE(tcases),
78 .test = run,
79 };
80