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git.ipfire.org Git - thirdparty/linux.git/blob - kernel/time/posix-stubs.c
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 SYS_NI(clock_adjtime32
);
49 #ifdef __ARCH_WANT_SYS_ALARM
54 * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC
55 * as it is easy to remain compatible with little code. CLOCK_BOOTTIME
56 * is also included for convenience as at least systemd uses it.
59 SYSCALL_DEFINE2(clock_settime
, const clockid_t
, which_clock
,
60 const struct __kernel_timespec __user
*, tp
)
62 struct timespec64 new_tp
;
64 if (which_clock
!= CLOCK_REALTIME
)
66 if (get_timespec64(&new_tp
, tp
))
69 return do_sys_settimeofday64(&new_tp
, NULL
);
72 int do_clock_gettime(clockid_t which_clock
, struct timespec64
*tp
)
74 switch (which_clock
) {
76 ktime_get_real_ts64(tp
);
82 ktime_get_boottime_ts64(tp
);
90 SYSCALL_DEFINE2(clock_gettime
, const clockid_t
, which_clock
,
91 struct __kernel_timespec __user
*, tp
)
94 struct timespec64 kernel_tp
;
96 ret
= do_clock_gettime(which_clock
, &kernel_tp
);
100 if (put_timespec64(&kernel_tp
, tp
))
105 SYSCALL_DEFINE2(clock_getres
, const clockid_t
, which_clock
, struct __kernel_timespec __user
*, tp
)
107 struct timespec64 rtn_tp
= {
109 .tv_nsec
= hrtimer_resolution
,
112 switch (which_clock
) {
114 case CLOCK_MONOTONIC
:
116 if (put_timespec64(&rtn_tp
, tp
))
124 SYSCALL_DEFINE4(clock_nanosleep
, const clockid_t
, which_clock
, int, flags
,
125 const struct __kernel_timespec __user
*, rqtp
,
126 struct __kernel_timespec __user
*, rmtp
)
130 switch (which_clock
) {
132 case CLOCK_MONOTONIC
:
139 if (get_timespec64(&t
, rqtp
))
141 if (!timespec64_valid(&t
))
143 if (flags
& TIMER_ABSTIME
)
145 current
->restart_block
.nanosleep
.type
= rmtp
? TT_NATIVE
: TT_NONE
;
146 current
->restart_block
.nanosleep
.rmtp
= rmtp
;
147 return hrtimer_nanosleep(&t
, flags
& TIMER_ABSTIME
?
148 HRTIMER_MODE_ABS
: HRTIMER_MODE_REL
,
153 COMPAT_SYS_NI(timer_create
);
154 COMPAT_SYS_NI(getitimer
);
155 COMPAT_SYS_NI(setitimer
);
158 #ifdef CONFIG_COMPAT_32BIT_TIME
159 SYS_NI(timer_settime32
);
160 SYS_NI(timer_gettime32
);
162 SYSCALL_DEFINE2(clock_settime32
, const clockid_t
, which_clock
,
163 struct old_timespec32 __user
*, tp
)
165 struct timespec64 new_tp
;
167 if (which_clock
!= CLOCK_REALTIME
)
169 if (get_old_timespec32(&new_tp
, tp
))
172 return do_sys_settimeofday64(&new_tp
, NULL
);
175 SYSCALL_DEFINE2(clock_gettime32
, clockid_t
, which_clock
,
176 struct old_timespec32 __user
*, tp
)
179 struct timespec64 kernel_tp
;
181 ret
= do_clock_gettime(which_clock
, &kernel_tp
);
185 if (put_old_timespec32(&kernel_tp
, tp
))
190 SYSCALL_DEFINE2(clock_getres_time32
, clockid_t
, which_clock
,
191 struct old_timespec32 __user
*, tp
)
193 struct timespec64 rtn_tp
= {
195 .tv_nsec
= hrtimer_resolution
,
198 switch (which_clock
) {
200 case CLOCK_MONOTONIC
:
202 if (put_old_timespec32(&rtn_tp
, tp
))
210 SYSCALL_DEFINE4(clock_nanosleep_time32
, clockid_t
, which_clock
, int, flags
,
211 struct old_timespec32 __user
*, rqtp
,
212 struct old_timespec32 __user
*, rmtp
)
216 switch (which_clock
) {
218 case CLOCK_MONOTONIC
:
225 if (get_old_timespec32(&t
, rqtp
))
227 if (!timespec64_valid(&t
))
229 if (flags
& TIMER_ABSTIME
)
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
,