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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/*
2 * Dummy stubs used when CONFIG_POSIX_TIMERS=n
3 *
4 * Created by: Nicolas Pitre, July 2016
5 * Copyright: (C) 2016 Linaro Limited
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/linkage.h>
13#include <linux/kernel.h>
14#include <linux/sched.h>
15#include <linux/errno.h>
16#include <linux/syscalls.h>
17#include <linux/ktime.h>
18#include <linux/timekeeping.h>
19#include <linux/posix-timers.h>
20#include <linux/compat.h>
21
22#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
23/* Architectures may override SYS_NI and COMPAT_SYS_NI */
24#include <asm/syscall_wrapper.h>
25#endif
26
27asmlinkage long sys_ni_posix_timers(void)
28{
29 pr_err_once("process %d (%s) attempted a POSIX timer syscall "
30 "while CONFIG_POSIX_TIMERS is not set\n",
31 current->pid, current->comm);
32 return -ENOSYS;
33}
34
35#ifndef SYS_NI
36#define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
37#endif
38
39#ifndef COMPAT_SYS_NI
40#define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
41#endif
42
43SYS_NI(timer_create);
44SYS_NI(timer_gettime);
45SYS_NI(timer_getoverrun);
46SYS_NI(timer_settime);
47SYS_NI(timer_delete);
48SYS_NI(clock_adjtime);
49SYS_NI(getitimer);
50SYS_NI(setitimer);
51#ifdef __ARCH_WANT_SYS_ALARM
52SYS_NI(alarm);
53#endif
54
55/*
56 * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC
57 * as it is easy to remain compatible with little code. CLOCK_BOOTTIME
58 * is also included for convenience as at least systemd uses it.
59 */
60
61SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
62 const struct timespec __user *, tp)
63{
64 struct timespec64 new_tp;
65
66 if (which_clock != CLOCK_REALTIME)
67 return -EINVAL;
68 if (get_timespec64(&new_tp, tp))
69 return -EFAULT;
70
71 return do_sys_settimeofday64(&new_tp, NULL);
72}
73
74int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
75{
76 switch (which_clock) {
77 case CLOCK_REALTIME:
78 ktime_get_real_ts64(tp);
79 break;
80 case CLOCK_MONOTONIC:
81 ktime_get_ts64(tp);
82 break;
83 case CLOCK_BOOTTIME:
84 get_monotonic_boottime64(tp);
85 break;
86 default:
87 return -EINVAL;
88 }
89
90 return 0;
91}
92SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
93 struct timespec __user *, tp)
94{
95 int ret;
96 struct timespec64 kernel_tp;
97
98 ret = do_clock_gettime(which_clock, &kernel_tp);
99 if (ret)
100 return ret;
101
102 if (put_timespec64(&kernel_tp, tp))
103 return -EFAULT;
104 return 0;
105}
106
107SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp)
108{
109 struct timespec64 rtn_tp = {
110 .tv_sec = 0,
111 .tv_nsec = hrtimer_resolution,
112 };
113
114 switch (which_clock) {
115 case CLOCK_REALTIME:
116 case CLOCK_MONOTONIC:
117 case CLOCK_BOOTTIME:
118 if (put_timespec64(&rtn_tp, tp))
119 return -EFAULT;
120 return 0;
121 default:
122 return -EINVAL;
123 }
124}
125
126SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
127 const struct timespec __user *, rqtp,
128 struct timespec __user *, rmtp)
129{
130 struct timespec64 t;
131
132 switch (which_clock) {
133 case CLOCK_REALTIME:
134 case CLOCK_MONOTONIC:
135 case CLOCK_BOOTTIME:
136 break;
137 default:
138 return -EINVAL;
139 }
140
141 if (get_timespec64(&t, rqtp))
142 return -EFAULT;
143 if (!timespec64_valid(&t))
144 return -EINVAL;
145 if (flags & TIMER_ABSTIME)
146 rmtp = NULL;
147 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
148 current->restart_block.nanosleep.rmtp = rmtp;
149 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
150 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
151 which_clock);
152}
153
154#ifdef CONFIG_COMPAT
155COMPAT_SYS_NI(timer_create);
156COMPAT_SYS_NI(clock_adjtime);
157COMPAT_SYS_NI(timer_settime);
158COMPAT_SYS_NI(timer_gettime);
159COMPAT_SYS_NI(getitimer);
160COMPAT_SYS_NI(setitimer);
161
162COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
163 struct compat_timespec __user *, tp)
164{
165 struct timespec64 new_tp;
166
167 if (which_clock != CLOCK_REALTIME)
168 return -EINVAL;
169 if (compat_get_timespec64(&new_tp, tp))
170 return -EFAULT;
171
172 return do_sys_settimeofday64(&new_tp, NULL);
173}
174
175COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
176 struct compat_timespec __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 (compat_put_timespec64(&kernel_tp, tp))
186 return -EFAULT;
187 return 0;
188}
189
190COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
191 struct compat_timespec __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 (compat_put_timespec64(&rtn_tp, tp))
203 return -EFAULT;
204 return 0;
205 default:
206 return -EINVAL;
207 }
208}
209
210COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
211 struct compat_timespec __user *, rqtp,
212 struct compat_timespec __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 (compat_get_timespec64(&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