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 "time64_variants.h"
29#include "tst_timer.h"
30
31static struct tst_its new_set, old_set;
32static struct tst_its *pnew_set = &new_set, *pold_set = &old_set, *null_set = NULL;
33static void *faulty_set;
34static kernel_timer_t timer;
35static kernel_timer_t timer_inval = (kernel_timer_t)-1;
36
37/* separate description-array to (hopefully) improve readability */
38static const char * const descriptions[] = {
39	"setting new_set pointer to NULL",
40	"setting tv_nsec to a negative value",
41	"setting tv_nsec value too high",
42	"passing pointer to invalid timer_id",
43	"passing invalid address for new_value",
44	"passing invalid address for old_value",
45};
46
47static struct testcase {
48	kernel_timer_t		*timer_id;
49	struct tst_its		**new_ptr;
50	struct tst_its		**old_ptr;
51	int			it_value_tv_nsec;
52	int			error;
53} tcases[] = {
54	{&timer, &null_set, &pold_set, 0, EINVAL},
55	{&timer, &pnew_set, &pold_set, -1, EINVAL},
56	{&timer, &pnew_set, &pold_set, NSEC_PER_SEC + 1, EINVAL},
57	{&timer_inval, &pnew_set, &pold_set, 0, EINVAL},
58	{&timer, (struct tst_its **)&faulty_set, &pold_set, 0, EFAULT},
59	{&timer, &pnew_set, (struct tst_its **)&faulty_set, 0, EFAULT},
60};
61
62static struct time64_variants variants[] = {
63#if (__NR_timer_settime != __LTP__NR_INVALID_SYSCALL)
64	{ .timer_settime = sys_timer_settime, .ts_type = TST_KERN_OLD_TIMESPEC, .desc = "syscall with old kernel spec"},
65#endif
66
67#if (__NR_timer_settime64 != __LTP__NR_INVALID_SYSCALL)
68	{ .timer_settime = sys_timer_settime64, .ts_type = TST_KERN_TIMESPEC, .desc = "syscall time64 with kernel spec"},
69#endif
70};
71
72static void setup(void)
73{
74	tst_res(TINFO, "Testing variant: %s", variants[tst_variant].desc);
75	faulty_set = tst_get_bad_addr(NULL);
76}
77
78static void run(unsigned int n)
79{
80	struct time64_variants *tv = &variants[tst_variant];
81	struct testcase *tc = &tcases[n];
82	void *new, *old;
83	unsigned int i;
84
85	tst_res(TINFO, "Testing for %s:", descriptions[n]);
86
87	for (i = 0; i < CLOCKS_DEFINED; ++i) {
88		clock_t clock = clock_list[i];
89
90		/* Init temporary timer */
91		TEST(tst_syscall(__NR_timer_create, clock, NULL, &timer));
92		if (TST_RET != 0) {
93			if (possibly_unsupported(clock) &&
94				(TST_ERR == EINVAL || TST_ERR == ENOTSUP)) {
95				tst_res(TCONF | TTERRNO, "%s unsupported",
96					get_clock_str(clock));
97			} else {
98				tst_res(TFAIL | TTERRNO,
99					"timer_create(%s) failed",
100					get_clock_str(clock));
101			}
102			continue;
103		}
104
105		memset(&new_set, 0, sizeof(new_set));
106		memset(&old_set, 0, sizeof(old_set));
107
108		new_set.type = old_set.type = tv->ts_type;
109		tst_its_set_interval_sec(&new_set, 0);
110		tst_its_set_interval_nsec(&new_set, 0);
111		tst_its_set_value_sec(&new_set, 5);
112		tst_its_set_value_nsec(&new_set, tc->it_value_tv_nsec);
113
114		new = (tc->new_ptr == (struct tst_its **)&faulty_set) ? faulty_set : tst_its_get(*tc->new_ptr);
115		old = (tc->old_ptr == (struct tst_its **)&faulty_set) ? faulty_set : tst_its_get(*tc->old_ptr);
116
117		TEST(tv->timer_settime(*tc->timer_id, 0, new, old));
118
119		if (tc->error != TST_ERR) {
120			tst_res(TFAIL | TTERRNO,
121				 "%s didn't fail as expected. Expected: %s - Got",
122				 get_clock_str(clock),
123				 tst_strerrno(tc->error));
124		} else {
125			tst_res(TPASS | TTERRNO,
126				"%s failed as expected",
127				get_clock_str(clock));
128		}
129
130		/* Delete temporary timer */
131		TEST(tst_syscall(__NR_timer_delete, timer));
132		if (TST_RET != 0)
133			tst_res(TFAIL | TTERRNO, "timer_delete() failed!");
134	}
135}
136
137static struct tst_test test = {
138	.test = run,
139	.needs_root = 1,
140	.tcnt = ARRAY_SIZE(tcases),
141	.test_variants = ARRAY_SIZE(variants),
142	.setup = setup,
143	.tags = (const struct tst_tag[]) {
144		{"linux-git", "f18ddc13af98"},
145		{}
146	}
147};
148