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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/*
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
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