2 * Dummy stubs used when CONFIG_POSIX_TIMERS=n
4 * Created by: Nicolas Pitre, July 2016
5 * Copyright: (C) 2016 Linaro Limited
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.
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>
22 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
23 /* Architectures may override SYS_NI and COMPAT_SYS_NI */
24 #include <asm/syscall_wrapper.h>
27 asmlinkage long sys_ni_posix_timers(void)
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);
36 #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
40 #define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
44 SYS_NI(timer_gettime);
45 SYS_NI(timer_getoverrun);
46 SYS_NI(timer_settime);
48 SYS_NI(clock_adjtime);
51 #ifdef __ARCH_WANT_SYS_ALARM
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.
61 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
62 const struct timespec __user *, tp)
64 struct timespec64 new_tp;
66 if (which_clock != CLOCK_REALTIME)
68 if (get_timespec64(&new_tp, tp))
71 return do_sys_settimeofday64(&new_tp, NULL);
74 int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
76 switch (which_clock) {
78 ktime_get_real_ts64(tp);
84 get_monotonic_boottime64(tp);
86 case CLOCK_MONOTONIC_ACTIVE:
87 ktime_get_active_ts64(tp);
94 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
95 struct timespec __user *, tp)
98 struct timespec64 kernel_tp;
100 ret = do_clock_gettime(which_clock, &kernel_tp);
104 if (put_timespec64(&kernel_tp, tp))
109 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp)
111 struct timespec64 rtn_tp = {
113 .tv_nsec = hrtimer_resolution,
116 switch (which_clock) {
118 case CLOCK_MONOTONIC:
120 if (put_timespec64(&rtn_tp, tp))
128 SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
129 const struct timespec __user *, rqtp,
130 struct timespec __user *, rmtp)
134 switch (which_clock) {
136 case CLOCK_MONOTONIC:
143 if (get_timespec64(&t, rqtp))
145 if (!timespec64_valid(&t))
147 if (flags & TIMER_ABSTIME)
149 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
150 current->restart_block.nanosleep.rmtp = rmtp;
151 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
152 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
157 COMPAT_SYS_NI(timer_create);
158 COMPAT_SYS_NI(clock_adjtime);
159 COMPAT_SYS_NI(timer_settime);
160 COMPAT_SYS_NI(timer_gettime);
161 COMPAT_SYS_NI(getitimer);
162 COMPAT_SYS_NI(setitimer);
165 #ifdef CONFIG_COMPAT_32BIT_TIME
166 COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
167 struct compat_timespec __user *, tp)
169 struct timespec64 new_tp;
171 if (which_clock != CLOCK_REALTIME)
173 if (compat_get_timespec64(&new_tp, tp))
176 return do_sys_settimeofday64(&new_tp, NULL);
179 COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
180 struct compat_timespec __user *, tp)
183 struct timespec64 kernel_tp;
185 ret = do_clock_gettime(which_clock, &kernel_tp);
189 if (compat_put_timespec64(&kernel_tp, tp))
194 COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
195 struct compat_timespec __user *, tp)
197 struct timespec64 rtn_tp = {
199 .tv_nsec = hrtimer_resolution,
202 switch (which_clock) {
204 case CLOCK_MONOTONIC:
206 if (compat_put_timespec64(&rtn_tp, tp))
214 COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
215 struct compat_timespec __user *, rqtp,
216 struct compat_timespec __user *, rmtp)
220 switch (which_clock) {
222 case CLOCK_MONOTONIC:
229 if (compat_get_timespec64(&t, rqtp))
231 if (!timespec64_valid(&t))
233 if (flags & TIMER_ABSTIME)
235 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
236 current->restart_block.nanosleep.compat_rmtp = rmtp;
237 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
238 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,