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/compat.h>
19 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
20 /* Architectures may override SYS_NI and COMPAT_SYS_NI */
21 #include <asm/syscall_wrapper.h>
24 asmlinkage long sys_ni_posix_timers(void)
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);
33 #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
37 #define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
41 SYS_NI(timer_gettime);
42 SYS_NI(timer_getoverrun);
43 SYS_NI(timer_settime);
45 SYS_NI(clock_adjtime);
48 #ifdef __ARCH_WANT_SYS_ALARM
53 * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC
54 * as it is easy to remain compatible with little code. CLOCK_BOOTTIME
55 * is also included for convenience as at least systemd uses it.
58 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
59 const struct __kernel_timespec __user *, tp)
61 struct timespec64 new_tp;
63 if (which_clock != CLOCK_REALTIME)
65 if (get_timespec64(&new_tp, tp))
68 return do_sys_settimeofday64(&new_tp, NULL);
71 int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
73 switch (which_clock) {
75 ktime_get_real_ts64(tp);
81 ktime_get_boottime_ts64(tp);
89 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
90 struct __kernel_timespec __user *, tp)
93 struct timespec64 kernel_tp;
95 ret = do_clock_gettime(which_clock, &kernel_tp);
99 if (put_timespec64(&kernel_tp, tp))
104 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
106 struct timespec64 rtn_tp = {
108 .tv_nsec = hrtimer_resolution,
111 switch (which_clock) {
113 case CLOCK_MONOTONIC:
115 if (put_timespec64(&rtn_tp, tp))
123 SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
124 const struct __kernel_timespec __user *, rqtp,
125 struct __kernel_timespec __user *, rmtp)
129 switch (which_clock) {
131 case CLOCK_MONOTONIC:
138 if (get_timespec64(&t, rqtp))
140 if (!timespec64_valid(&t))
142 if (flags & TIMER_ABSTIME)
144 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
145 current->restart_block.nanosleep.rmtp = rmtp;
146 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
147 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
152 COMPAT_SYS_NI(timer_create);
153 COMPAT_SYS_NI(clock_adjtime);
154 COMPAT_SYS_NI(timer_settime);
155 COMPAT_SYS_NI(timer_gettime);
156 COMPAT_SYS_NI(getitimer);
157 COMPAT_SYS_NI(setitimer);
160 #ifdef CONFIG_COMPAT_32BIT_TIME
161 COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
162 struct old_timespec32 __user *, tp)
164 struct timespec64 new_tp;
166 if (which_clock != CLOCK_REALTIME)
168 if (get_old_timespec32(&new_tp, tp))
171 return do_sys_settimeofday64(&new_tp, NULL);
174 COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
175 struct old_timespec32 __user *, tp)
178 struct timespec64 kernel_tp;
180 ret = do_clock_gettime(which_clock, &kernel_tp);
184 if (put_old_timespec32(&kernel_tp, tp))
189 COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
190 struct old_timespec32 __user *, tp)
192 struct timespec64 rtn_tp = {
194 .tv_nsec = hrtimer_resolution,
197 switch (which_clock) {
199 case CLOCK_MONOTONIC:
201 if (put_old_timespec32(&rtn_tp, tp))
209 COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
210 struct old_timespec32 __user *, rqtp,
211 struct old_timespec32 __user *, rmtp)
215 switch (which_clock) {
217 case CLOCK_MONOTONIC:
224 if (get_old_timespec32(&t, rqtp))
226 if (!timespec64_valid(&t))
228 if (flags & TIMER_ABSTIME)
230 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
231 current->restart_block.nanosleep.compat_rmtp = rmtp;
232 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
233 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,