1 // SPDX-License-Identifier: GPL-2.0
3 * Dummy stubs used when CONFIG_POSIX_TIMERS=n
5 * Created by: Nicolas Pitre, July 2016
6 * Copyright: (C) 2016 Linaro Limited
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>
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.
26 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
27 const struct __kernel_timespec __user *, tp)
29 struct timespec64 new_tp;
31 if (which_clock != CLOCK_REALTIME)
33 if (get_timespec64(&new_tp, tp))
36 return do_sys_settimeofday64(&new_tp, NULL);
39 static int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
41 switch (which_clock) {
43 ktime_get_real_ts64(tp);
47 timens_add_monotonic(tp);
50 ktime_get_boottime_ts64(tp);
51 timens_add_boottime(tp);
60 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
61 struct __kernel_timespec __user *, tp)
64 struct timespec64 kernel_tp;
66 ret = do_clock_gettime(which_clock, &kernel_tp);
70 if (put_timespec64(&kernel_tp, tp))
75 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
77 struct timespec64 rtn_tp = {
79 .tv_nsec = hrtimer_resolution,
82 switch (which_clock) {
86 if (put_timespec64(&rtn_tp, tp))
94 SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
95 const struct __kernel_timespec __user *, rqtp,
96 struct __kernel_timespec __user *, rmtp)
101 switch (which_clock) {
103 case CLOCK_MONOTONIC:
110 if (get_timespec64(&t, rqtp))
112 if (!timespec64_valid(&t))
114 if (flags & TIMER_ABSTIME)
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,
127 #ifdef CONFIG_COMPAT_32BIT_TIME
129 SYSCALL_DEFINE2(clock_settime32, const clockid_t, which_clock,
130 struct old_timespec32 __user *, tp)
132 struct timespec64 new_tp;
134 if (which_clock != CLOCK_REALTIME)
136 if (get_old_timespec32(&new_tp, tp))
139 return do_sys_settimeofday64(&new_tp, NULL);
142 SYSCALL_DEFINE2(clock_gettime32, clockid_t, which_clock,
143 struct old_timespec32 __user *, tp)
146 struct timespec64 kernel_tp;
148 ret = do_clock_gettime(which_clock, &kernel_tp);
152 if (put_old_timespec32(&kernel_tp, tp))
157 SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
158 struct old_timespec32 __user *, tp)
160 struct timespec64 rtn_tp = {
162 .tv_nsec = hrtimer_resolution,
165 switch (which_clock) {
167 case CLOCK_MONOTONIC:
169 if (put_old_timespec32(&rtn_tp, tp))
177 SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags,
178 struct old_timespec32 __user *, rqtp,
179 struct old_timespec32 __user *, rmtp)
184 switch (which_clock) {
186 case CLOCK_MONOTONIC:
193 if (get_old_timespec32(&t, rqtp))
195 if (!timespec64_valid(&t))
197 if (flags & TIMER_ABSTIME)
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,