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