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 __kernel_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 ktime_get_boottime_ts64(tp);
92 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
93 struct __kernel_timespec __user *, tp)
96 struct timespec64 kernel_tp;
98 ret = do_clock_gettime(which_clock, &kernel_tp);
102 if (put_timespec64(&kernel_tp, tp))
107 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
109 struct timespec64 rtn_tp = {
111 .tv_nsec = hrtimer_resolution,
114 switch (which_clock) {
116 case CLOCK_MONOTONIC:
118 if (put_timespec64(&rtn_tp, tp))
126 SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
127 const struct __kernel_timespec __user *, rqtp,
128 struct __kernel_timespec __user *, rmtp)
132 switch (which_clock) {
134 case CLOCK_MONOTONIC:
141 if (get_timespec64(&t, rqtp))
143 if (!timespec64_valid(&t))
145 if (flags & TIMER_ABSTIME)
147 current->restart_block.fn = do_no_restart_syscall;
148 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
149 current->restart_block.nanosleep.rmtp = rmtp;
150 return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
151 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
156 COMPAT_SYS_NI(timer_create);
157 COMPAT_SYS_NI(clock_adjtime);
158 COMPAT_SYS_NI(timer_settime);
159 COMPAT_SYS_NI(timer_gettime);
160 COMPAT_SYS_NI(getitimer);
161 COMPAT_SYS_NI(setitimer);
164 #ifdef CONFIG_COMPAT_32BIT_TIME
165 COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
166 struct compat_timespec __user *, tp)
168 struct timespec64 new_tp;
170 if (which_clock != CLOCK_REALTIME)
172 if (compat_get_timespec64(&new_tp, tp))
175 return do_sys_settimeofday64(&new_tp, NULL);
178 COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
179 struct compat_timespec __user *, tp)
182 struct timespec64 kernel_tp;
184 ret = do_clock_gettime(which_clock, &kernel_tp);
188 if (compat_put_timespec64(&kernel_tp, tp))
193 COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
194 struct compat_timespec __user *, tp)
196 struct timespec64 rtn_tp = {
198 .tv_nsec = hrtimer_resolution,
201 switch (which_clock) {
203 case CLOCK_MONOTONIC:
205 if (compat_put_timespec64(&rtn_tp, tp))
213 COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
214 struct compat_timespec __user *, rqtp,
215 struct compat_timespec __user *, rmtp)
219 switch (which_clock) {
221 case CLOCK_MONOTONIC:
228 if (compat_get_timespec64(&t, rqtp))
230 if (!timespec64_valid(&t))
232 if (flags & TIMER_ABSTIME)
234 current->restart_block.fn = do_no_restart_syscall;
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,