1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) Wipro Technologies Ltd, 2003. All Rights Reserved.
4 *
5 * Author: Aniruddha Marathe <aniruddha.marathe@wipro.com>
6 *
7 * Ported to new library:
8 * 07/2019 Christian Amann <camann@suse.com>
9 */
10 /*
11 * This tests basic error handling of the timer_settime(2) syscall:
12 *
13 * 1) Setting pointer to new settings to NULL -> EINVAL
14 * 2) Setting tv_nsec of the itimerspec structure to a negative value
15 * -> EINVAL
16 * 3) Setting tv_nsec of the itimerspec structure to something larger
17 * than NSEC_PER_SEC -> EINVAL
18 * 4) Passing an invalid timer -> EINVAL
19 * 5) Passing an invalid address for new_value -> EFAULT
20 * 6) Passing an invalid address for old_value -> EFAULT
21 *
22 * This is also regression test for commit:
23 * f18ddc13af98 ("alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP")
24 */
25
26 #include <errno.h>
27 #include <time.h>
28 #include "tst_test.h"
29 #include "lapi/common_timers.h"
30
31 static struct itimerspec new_set, old_set;
32 static kernel_timer_t timer;
33 static kernel_timer_t timer_inval = -1;
34
35 /* separate description-array to (hopefully) improve readability */
36 static const char * const descriptions[] = {
37 "setting new_set pointer to NULL",
38 "setting tv_nsec to a negative value",
39 "setting tv_nsec value too high",
40 "passing pointer to invalid timer_id",
41 "passing invalid address for new_value",
42 "passing invalid address for old_value",
43 };
44
45 static struct testcase {
46 kernel_timer_t *timer_id;
47 struct itimerspec *new_ptr;
48 struct itimerspec *old_ptr;
49 int it_value_tv_nsec;
50 int error;
51 } tcases[] = {
52 {&timer, NULL, &old_set, 0, EINVAL},
53 {&timer, &new_set, &old_set, -1, EINVAL},
54 {&timer, &new_set, &old_set, NSEC_PER_SEC + 1, EINVAL},
55 {&timer_inval, &new_set, &old_set, 0, EINVAL},
56 {&timer, (struct itimerspec *) -1, &old_set, 0, EFAULT},
57 {&timer, &new_set, (struct itimerspec *) -1, 0, EFAULT},
58 };
59
run(unsigned int n)60 static void run(unsigned int n)
61 {
62 unsigned int i;
63 struct testcase *tc = &tcases[n];
64
65 tst_res(TINFO, "Testing for %s:", descriptions[n]);
66
67 for (i = 0; i < CLOCKS_DEFINED; ++i) {
68 clock_t clock = clock_list[i];
69
70 if (clock == CLOCK_PROCESS_CPUTIME_ID ||
71 clock == CLOCK_THREAD_CPUTIME_ID) {
72 if (!have_cputime_timers())
73 continue;
74 }
75
76 /* Init temporary timer */
77 TEST(tst_syscall(__NR_timer_create, clock, NULL, &timer));
78 if (TST_RET != 0) {
79 if (possibly_unsupported(clock) &&
80 (TST_ERR == EINVAL || TST_ERR == ENOTSUP)) {
81 tst_res(TCONF | TTERRNO, "%s unsupported",
82 get_clock_str(clock));
83 } else {
84 tst_res(TFAIL | TTERRNO,
85 "timer_create(%s) failed",
86 get_clock_str(clock));
87 }
88 continue;
89 }
90
91 memset(&new_set, 0, sizeof(new_set));
92 memset(&old_set, 0, sizeof(old_set));
93
94 new_set.it_value.tv_sec = 5;
95 new_set.it_value.tv_nsec = tc->it_value_tv_nsec;
96
97 TEST(tst_syscall(__NR_timer_settime, *tc->timer_id,
98 0, tc->new_ptr, tc->old_ptr));
99
100 if (tc->error != TST_ERR) {
101 tst_res(TFAIL | TTERRNO,
102 "%s didn't fail as expected. Expected: %s - Got",
103 get_clock_str(clock),
104 tst_strerrno(tc->error));
105 } else {
106 tst_res(TPASS | TTERRNO,
107 "%s failed as expected",
108 get_clock_str(clock));
109 }
110
111 /* Delete temporary timer */
112 TEST(tst_syscall(__NR_timer_delete, timer));
113 if (TST_RET != 0)
114 tst_res(TFAIL | TTERRNO, "timer_delete() failed!");
115 }
116 }
117
118 static struct tst_test test = {
119 .test = run,
120 .needs_root = 1,
121 .tcnt = ARRAY_SIZE(tcases),
122 .tags = (const struct tst_tag[]) {
123 {"linux-git", "f18ddc13af98"},
124 {}
125 }
126 };
127