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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>
19
20#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
21
22#include <asm/syscall_wrapper.h>
23#endif
24
25asmlinkage long sys_ni_posix_timers(void)
26{
27 pr_err_once("process %d (%s) attempted a POSIX timer syscall "
28 "while CONFIG_POSIX_TIMERS is not set\n",
29 current->pid, current->comm);
30 return -ENOSYS;
31}
32
33#ifndef SYS_NI
34#define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
35#endif
36
37#ifndef COMPAT_SYS_NI
38#define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
39#endif
40
41SYS_NI(timer_create);
42SYS_NI(timer_gettime);
43SYS_NI(timer_getoverrun);
44SYS_NI(timer_settime);
45SYS_NI(timer_delete);
46SYS_NI(clock_adjtime);
47SYS_NI(getitimer);
48SYS_NI(setitimer);
49SYS_NI(clock_adjtime32);
50#ifdef __ARCH_WANT_SYS_ALARM
51SYS_NI(alarm);
52#endif
53
54
55
56
57
58
59
60SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
61 const struct __kernel_timespec __user *, tp)
62{
63 struct timespec64 new_tp;
64
65 if (which_clock != CLOCK_REALTIME)
66 return -EINVAL;
67 if (get_timespec64(&new_tp, tp))
68 return -EFAULT;
69
70 return do_sys_settimeofday64(&new_tp, NULL);
71}
72
73int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
74{
75 switch (which_clock) {
76 case CLOCK_REALTIME:
77 ktime_get_real_ts64(tp);
78 break;
79 case CLOCK_MONOTONIC:
80 ktime_get_ts64(tp);
81 timens_add_monotonic(tp);
82 break;
83 case CLOCK_BOOTTIME:
84 ktime_get_boottime_ts64(tp);
85 timens_add_boottime(tp);
86 break;
87 default:
88 return -EINVAL;
89 }
90
91 return 0;
92}
93SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
94 struct __kernel_timespec __user *, tp)
95{
96 int ret;
97 struct timespec64 kernel_tp;
98
99 ret = do_clock_gettime(which_clock, &kernel_tp);
100 if (ret)
101 return ret;
102
103 if (put_timespec64(&kernel_tp, tp))
104 return -EFAULT;
105 return 0;
106}
107
108SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
109{
110 struct timespec64 rtn_tp = {
111 .tv_sec = 0,
112 .tv_nsec = hrtimer_resolution,
113 };
114
115 switch (which_clock) {
116 case CLOCK_REALTIME:
117 case CLOCK_MONOTONIC:
118 case CLOCK_BOOTTIME:
119 if (put_timespec64(&rtn_tp, tp))
120 return -EFAULT;
121 return 0;
122 default:
123 return -EINVAL;
124 }
125}
126
127SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
128 const struct __kernel_timespec __user *, rqtp,
129 struct __kernel_timespec __user *, rmtp)
130{
131 struct timespec64 t;
132 ktime_t texp;
133
134 switch (which_clock) {
135 case CLOCK_REALTIME:
136 case CLOCK_MONOTONIC:
137 case CLOCK_BOOTTIME:
138 break;
139 default:
140 return -EINVAL;
141 }
142
143 if (get_timespec64(&t, rqtp))
144 return -EFAULT;
145 if (!timespec64_valid(&t))
146 return -EINVAL;
147 if (flags & TIMER_ABSTIME)
148 rmtp = NULL;
149 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
150 current->restart_block.nanosleep.rmtp = rmtp;
151 texp = timespec64_to_ktime(t);
152 if (flags & TIMER_ABSTIME)
153 texp = timens_ktime_to_host(which_clock, texp);
154 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
155 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
156 which_clock);
157}
158
159#ifdef CONFIG_COMPAT
160COMPAT_SYS_NI(timer_create);
161#endif
162
163#if defined(CONFIG_COMPAT) || defined(CONFIG_ALPHA)
164COMPAT_SYS_NI(getitimer);
165COMPAT_SYS_NI(setitimer);
166#endif
167
168#ifdef CONFIG_COMPAT_32BIT_TIME
169SYS_NI(timer_settime32);
170SYS_NI(timer_gettime32);
171
172SYSCALL_DEFINE2(clock_settime32, const clockid_t, which_clock,
173 struct old_timespec32 __user *, tp)
174{
175 struct timespec64 new_tp;
176
177 if (which_clock != CLOCK_REALTIME)
178 return -EINVAL;
179 if (get_old_timespec32(&new_tp, tp))
180 return -EFAULT;
181
182 return do_sys_settimeofday64(&new_tp, NULL);
183}
184
185SYSCALL_DEFINE2(clock_gettime32, clockid_t, which_clock,
186 struct old_timespec32 __user *, tp)
187{
188 int ret;
189 struct timespec64 kernel_tp;
190
191 ret = do_clock_gettime(which_clock, &kernel_tp);
192 if (ret)
193 return ret;
194
195 if (put_old_timespec32(&kernel_tp, tp))
196 return -EFAULT;
197 return 0;
198}
199
200SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
201 struct old_timespec32 __user *, tp)
202{
203 struct timespec64 rtn_tp = {
204 .tv_sec = 0,
205 .tv_nsec = hrtimer_resolution,
206 };
207
208 switch (which_clock) {
209 case CLOCK_REALTIME:
210 case CLOCK_MONOTONIC:
211 case CLOCK_BOOTTIME:
212 if (put_old_timespec32(&rtn_tp, tp))
213 return -EFAULT;
214 return 0;
215 default:
216 return -EINVAL;
217 }
218}
219
220SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags,
221 struct old_timespec32 __user *, rqtp,
222 struct old_timespec32 __user *, rmtp)
223{
224 struct timespec64 t;
225 ktime_t texp;
226
227 switch (which_clock) {
228 case CLOCK_REALTIME:
229 case CLOCK_MONOTONIC:
230 case CLOCK_BOOTTIME:
231 break;
232 default:
233 return -EINVAL;
234 }
235
236 if (get_old_timespec32(&t, rqtp))
237 return -EFAULT;
238 if (!timespec64_valid(&t))
239 return -EINVAL;
240 if (flags & TIMER_ABSTIME)
241 rmtp = NULL;
242 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
243 current->restart_block.nanosleep.compat_rmtp = rmtp;
244 texp = timespec64_to_ktime(t);
245 if (flags & TIMER_ABSTIME)
246 texp = timens_ktime_to_host(which_clock, texp);
247 return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
248 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
249 which_clock);
250}
251#endif
252
