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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Dummy stubs used when CONFIG_POSIX_TIMERS=n
4 *
5 * Created by: Nicolas Pitre, July 2016
6 * Copyright: (C) 2016 Linaro Limited
7 */
8
9#include <linux/linkage.h>
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/errno.h>
13#include <linux/syscalls.h>
14#include <linux/ktime.h>
15#include <linux/timekeeping.h>
16#include <linux/posix-timers.h>
17#include <linux/time_namespace.h>
18#include <linux/compat.h>
19
20#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
21/* Architectures may override SYS_NI and COMPAT_SYS_NI */
22#include <asm/syscall_wrapper.h>
23#endif
24
25asmlinkage long sys_ni_posix_timers(void)
26{
27 pr_err_once("process %d (%s) attempted a POSIX timer syscall "
28 "while CONFIG_POSIX_TIMERS is not set\n",
29 current->pid, current->comm);
30 return -ENOSYS;
31}
32
33#ifndef SYS_NI
34#define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
35#endif
36
37#ifndef COMPAT_SYS_NI
38#define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
39#endif
40
41SYS_NI(timer_create);
42SYS_NI(timer_gettime);
43SYS_NI(timer_getoverrun);
44SYS_NI(timer_settime);
45SYS_NI(timer_delete);
46SYS_NI(clock_adjtime);
47SYS_NI(getitimer);
48SYS_NI(setitimer);
49SYS_NI(clock_adjtime32);
50#ifdef __ARCH_WANT_SYS_ALARM
51SYS_NI(alarm);
52#endif
53
54/*
55 * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC
56 * as it is easy to remain compatible with little code. CLOCK_BOOTTIME
57 * is also included for convenience as at least systemd uses it.
58 */
59
60SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
61 const struct __kernel_timespec __user *, tp)
62{
63 struct timespec64 new_tp;
64
65 if (which_clock != CLOCK_REALTIME)
66 return -EINVAL;
67 if (get_timespec64(&new_tp, tp))
68 return -EFAULT;
69
70 return do_sys_settimeofday64(&new_tp, NULL);
71}
72
73static int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
74{
75 switch (which_clock) {
76 case CLOCK_REALTIME:
77 ktime_get_real_ts64(tp);
78 break;
79 case CLOCK_MONOTONIC:
80 ktime_get_ts64(tp);
81 timens_add_monotonic(tp);
82 break;
83 case CLOCK_BOOTTIME:
84 ktime_get_boottime_ts64(tp);
85 timens_add_boottime(tp);
86 break;
87 default:
88 return -EINVAL;
89 }
90
91 return 0;
92}
93
94SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
95 struct __kernel_timespec __user *, tp)
96{
97 int ret;
98 struct timespec64 kernel_tp;
99
100 ret = do_clock_gettime(which_clock, &kernel_tp);
101 if (ret)
102 return ret;
103
104 if (put_timespec64(&kernel_tp, tp))
105 return -EFAULT;
106 return 0;
107}
108
109SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
110{
111 struct timespec64 rtn_tp = {
112 .tv_sec = 0,
113 .tv_nsec = hrtimer_resolution,
114 };
115
116 switch (which_clock) {
117 case CLOCK_REALTIME:
118 case CLOCK_MONOTONIC:
119 case CLOCK_BOOTTIME:
120 if (put_timespec64(&rtn_tp, tp))
121 return -EFAULT;
122 return 0;
123 default:
124 return -EINVAL;
125 }
126}
127
128SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
129 const struct __kernel_timespec __user *, rqtp,
130 struct __kernel_timespec __user *, rmtp)
131{
132 struct timespec64 t;
133 ktime_t texp;
134
135 switch (which_clock) {
136 case CLOCK_REALTIME:
137 case CLOCK_MONOTONIC:
138 case CLOCK_BOOTTIME:
139 break;
140 default:
141 return -EINVAL;
142 }
143
144 if (get_timespec64(&t, rqtp))
145 return -EFAULT;
146 if (!timespec64_valid(&t))
147 return -EINVAL;
148 if (flags & TIMER_ABSTIME)
149 rmtp = NULL;
150 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
151 current->restart_block.nanosleep.rmtp = rmtp;
152 texp = timespec64_to_ktime(t);
153 if (flags & TIMER_ABSTIME)
154 texp = timens_ktime_to_host(which_clock, texp);
155 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
156 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
157 which_clock);
158}
159
160#ifdef CONFIG_COMPAT
161COMPAT_SYS_NI(timer_create);
162#endif
163
164#if defined(CONFIG_COMPAT) || defined(CONFIG_ALPHA)
165COMPAT_SYS_NI(getitimer);
166COMPAT_SYS_NI(setitimer);
167#endif
168
169#ifdef CONFIG_COMPAT_32BIT_TIME
170SYS_NI(timer_settime32);
171SYS_NI(timer_gettime32);
172
173SYSCALL_DEFINE2(clock_settime32, const clockid_t, which_clock,
174 struct old_timespec32 __user *, tp)
175{
176 struct timespec64 new_tp;
177
178 if (which_clock != CLOCK_REALTIME)
179 return -EINVAL;
180 if (get_old_timespec32(&new_tp, tp))
181 return -EFAULT;
182
183 return do_sys_settimeofday64(&new_tp, NULL);
184}
185
186SYSCALL_DEFINE2(clock_gettime32, clockid_t, which_clock,
187 struct old_timespec32 __user *, tp)
188{
189 int ret;
190 struct timespec64 kernel_tp;
191
192 ret = do_clock_gettime(which_clock, &kernel_tp);
193 if (ret)
194 return ret;
195
196 if (put_old_timespec32(&kernel_tp, tp))
197 return -EFAULT;
198 return 0;
199}
200
201SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
202 struct old_timespec32 __user *, tp)
203{
204 struct timespec64 rtn_tp = {
205 .tv_sec = 0,
206 .tv_nsec = hrtimer_resolution,
207 };
208
209 switch (which_clock) {
210 case CLOCK_REALTIME:
211 case CLOCK_MONOTONIC:
212 case CLOCK_BOOTTIME:
213 if (put_old_timespec32(&rtn_tp, tp))
214 return -EFAULT;
215 return 0;
216 default:
217 return -EINVAL;
218 }
219}
220
221SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags,
222 struct old_timespec32 __user *, rqtp,
223 struct old_timespec32 __user *, rmtp)
224{
225 struct timespec64 t;
226 ktime_t texp;
227
228 switch (which_clock) {
229 case CLOCK_REALTIME:
230 case CLOCK_MONOTONIC:
231 case CLOCK_BOOTTIME:
232 break;
233 default:
234 return -EINVAL;
235 }
236
237 if (get_old_timespec32(&t, rqtp))
238 return -EFAULT;
239 if (!timespec64_valid(&t))
240 return -EINVAL;
241 if (flags & TIMER_ABSTIME)
242 rmtp = NULL;
243 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
244 current->restart_block.nanosleep.compat_rmtp = rmtp;
245 texp = timespec64_to_ktime(t);
246 if (flags & TIMER_ABSTIME)
247 texp = timens_ktime_to_host(which_clock, texp);
248 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
249 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
250 which_clock);
251}
252#endif
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Dummy stubs used when CONFIG_POSIX_TIMERS=n
4 *
5 * Created by: Nicolas Pitre, July 2016
6 * Copyright: (C) 2016 Linaro Limited
7 */
8
9#include <linux/linkage.h>
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/errno.h>
13#include <linux/syscalls.h>
14#include <linux/ktime.h>
15#include <linux/timekeeping.h>
16#include <linux/posix-timers.h>
17#include <linux/time_namespace.h>
18#include <linux/compat.h>
19
20/*
21 * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC
22 * as it is easy to remain compatible with little code. CLOCK_BOOTTIME
23 * is also included for convenience as at least systemd uses it.
24 */
25
26SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
27 const struct __kernel_timespec __user *, tp)
28{
29 struct timespec64 new_tp;
30
31 if (which_clock != CLOCK_REALTIME)
32 return -EINVAL;
33 if (get_timespec64(&new_tp, tp))
34 return -EFAULT;
35
36 return do_sys_settimeofday64(&new_tp, NULL);
37}
38
39static int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
40{
41 switch (which_clock) {
42 case CLOCK_REALTIME:
43 ktime_get_real_ts64(tp);
44 break;
45 case CLOCK_MONOTONIC:
46 ktime_get_ts64(tp);
47 timens_add_monotonic(tp);
48 break;
49 case CLOCK_BOOTTIME:
50 ktime_get_boottime_ts64(tp);
51 timens_add_boottime(tp);
52 break;
53 default:
54 return -EINVAL;
55 }
56
57 return 0;
58}
59
60SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
61 struct __kernel_timespec __user *, tp)
62{
63 int ret;
64 struct timespec64 kernel_tp;
65
66 ret = do_clock_gettime(which_clock, &kernel_tp);
67 if (ret)
68 return ret;
69
70 if (put_timespec64(&kernel_tp, tp))
71 return -EFAULT;
72 return 0;
73}
74
75SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
76{
77 struct timespec64 rtn_tp = {
78 .tv_sec = 0,
79 .tv_nsec = hrtimer_resolution,
80 };
81
82 switch (which_clock) {
83 case CLOCK_REALTIME:
84 case CLOCK_MONOTONIC:
85 case CLOCK_BOOTTIME:
86 if (put_timespec64(&rtn_tp, tp))
87 return -EFAULT;
88 return 0;
89 default:
90 return -EINVAL;
91 }
92}
93
94SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
95 const struct __kernel_timespec __user *, rqtp,
96 struct __kernel_timespec __user *, rmtp)
97{
98 struct timespec64 t;
99 ktime_t texp;
100
101 switch (which_clock) {
102 case CLOCK_REALTIME:
103 case CLOCK_MONOTONIC:
104 case CLOCK_BOOTTIME:
105 break;
106 default:
107 return -EINVAL;
108 }
109
110 if (get_timespec64(&t, rqtp))
111 return -EFAULT;
112 if (!timespec64_valid(&t))
113 return -EINVAL;
114 if (flags & TIMER_ABSTIME)
115 rmtp = NULL;
116 current->restart_block.fn = do_no_restart_syscall;
117 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
118 current->restart_block.nanosleep.rmtp = rmtp;
119 texp = timespec64_to_ktime(t);
120 if (flags & TIMER_ABSTIME)
121 texp = timens_ktime_to_host(which_clock, texp);
122 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
123 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
124 which_clock);
125}
126
127#ifdef CONFIG_COMPAT_32BIT_TIME
128
129SYSCALL_DEFINE2(clock_settime32, const clockid_t, which_clock,
130 struct old_timespec32 __user *, tp)
131{
132 struct timespec64 new_tp;
133
134 if (which_clock != CLOCK_REALTIME)
135 return -EINVAL;
136 if (get_old_timespec32(&new_tp, tp))
137 return -EFAULT;
138
139 return do_sys_settimeofday64(&new_tp, NULL);
140}
141
142SYSCALL_DEFINE2(clock_gettime32, clockid_t, which_clock,
143 struct old_timespec32 __user *, tp)
144{
145 int ret;
146 struct timespec64 kernel_tp;
147
148 ret = do_clock_gettime(which_clock, &kernel_tp);
149 if (ret)
150 return ret;
151
152 if (put_old_timespec32(&kernel_tp, tp))
153 return -EFAULT;
154 return 0;
155}
156
157SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
158 struct old_timespec32 __user *, tp)
159{
160 struct timespec64 rtn_tp = {
161 .tv_sec = 0,
162 .tv_nsec = hrtimer_resolution,
163 };
164
165 switch (which_clock) {
166 case CLOCK_REALTIME:
167 case CLOCK_MONOTONIC:
168 case CLOCK_BOOTTIME:
169 if (put_old_timespec32(&rtn_tp, tp))
170 return -EFAULT;
171 return 0;
172 default:
173 return -EINVAL;
174 }
175}
176
177SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags,
178 struct old_timespec32 __user *, rqtp,
179 struct old_timespec32 __user *, rmtp)
180{
181 struct timespec64 t;
182 ktime_t texp;
183
184 switch (which_clock) {
185 case CLOCK_REALTIME:
186 case CLOCK_MONOTONIC:
187 case CLOCK_BOOTTIME:
188 break;
189 default:
190 return -EINVAL;
191 }
192
193 if (get_old_timespec32(&t, rqtp))
194 return -EFAULT;
195 if (!timespec64_valid(&t))
196 return -EINVAL;
197 if (flags & TIMER_ABSTIME)
198 rmtp = NULL;
199 current->restart_block.fn = do_no_restart_syscall;
200 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
201 current->restart_block.nanosleep.compat_rmtp = rmtp;
202 texp = timespec64_to_ktime(t);
203 if (flags & TIMER_ABSTIME)
204 texp = timens_ktime_to_host(which_clock, texp);
205 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
206 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
207 which_clock);
208}
209#endif