This source file includes following definitions.
- sys_ni_posix_timers
- SYSCALL_DEFINE2
- do_clock_gettime
- SYSCALL_DEFINE2
- SYSCALL_DEFINE2
- SYSCALL_DEFINE4
- SYSCALL_DEFINE2
- SYSCALL_DEFINE2
- SYSCALL_DEFINE2
- SYSCALL_DEFINE4
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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/compat.h>
18
19 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
20
21 #include <asm/syscall_wrapper.h>
22 #endif
23
24 asmlinkage long sys_ni_posix_timers(void)
25 {
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);
29 return -ENOSYS;
30 }
31
32 #ifndef SYS_NI
33 #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers)
34 #endif
35
36 #ifndef COMPAT_SYS_NI
37 #define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers)
38 #endif
39
40 SYS_NI(timer_create);
41 SYS_NI(timer_gettime);
42 SYS_NI(timer_getoverrun);
43 SYS_NI(timer_settime);
44 SYS_NI(timer_delete);
45 SYS_NI(clock_adjtime);
46 SYS_NI(getitimer);
47 SYS_NI(setitimer);
48 SYS_NI(clock_adjtime32);
49 #ifdef __ARCH_WANT_SYS_ALARM
50 SYS_NI(alarm);
51 #endif
52
53
54
55
56
57
58
59 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
60 const struct __kernel_timespec __user *, tp)
61 {
62 struct timespec64 new_tp;
63
64 if (which_clock != CLOCK_REALTIME)
65 return -EINVAL;
66 if (get_timespec64(&new_tp, tp))
67 return -EFAULT;
68
69 return do_sys_settimeofday64(&new_tp, NULL);
70 }
71
72 int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
73 {
74 switch (which_clock) {
75 case CLOCK_REALTIME:
76 ktime_get_real_ts64(tp);
77 break;
78 case CLOCK_MONOTONIC:
79 ktime_get_ts64(tp);
80 break;
81 case CLOCK_BOOTTIME:
82 ktime_get_boottime_ts64(tp);
83 break;
84 default:
85 return -EINVAL;
86 }
87
88 return 0;
89 }
90 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
91 struct __kernel_timespec __user *, tp)
92 {
93 int ret;
94 struct timespec64 kernel_tp;
95
96 ret = do_clock_gettime(which_clock, &kernel_tp);
97 if (ret)
98 return ret;
99
100 if (put_timespec64(&kernel_tp, tp))
101 return -EFAULT;
102 return 0;
103 }
104
105 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_timespec __user *, tp)
106 {
107 struct timespec64 rtn_tp = {
108 .tv_sec = 0,
109 .tv_nsec = hrtimer_resolution,
110 };
111
112 switch (which_clock) {
113 case CLOCK_REALTIME:
114 case CLOCK_MONOTONIC:
115 case CLOCK_BOOTTIME:
116 if (put_timespec64(&rtn_tp, tp))
117 return -EFAULT;
118 return 0;
119 default:
120 return -EINVAL;
121 }
122 }
123
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)
127 {
128 struct timespec64 t;
129
130 switch (which_clock) {
131 case CLOCK_REALTIME:
132 case CLOCK_MONOTONIC:
133 case CLOCK_BOOTTIME:
134 break;
135 default:
136 return -EINVAL;
137 }
138
139 if (get_timespec64(&t, rqtp))
140 return -EFAULT;
141 if (!timespec64_valid(&t))
142 return -EINVAL;
143 if (flags & TIMER_ABSTIME)
144 rmtp = NULL;
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,
149 which_clock);
150 }
151
152 #ifdef CONFIG_COMPAT
153 COMPAT_SYS_NI(timer_create);
154 COMPAT_SYS_NI(getitimer);
155 COMPAT_SYS_NI(setitimer);
156 #endif
157
158 #ifdef CONFIG_COMPAT_32BIT_TIME
159 SYS_NI(timer_settime32);
160 SYS_NI(timer_gettime32);
161
162 SYSCALL_DEFINE2(clock_settime32, const clockid_t, which_clock,
163 struct old_timespec32 __user *, tp)
164 {
165 struct timespec64 new_tp;
166
167 if (which_clock != CLOCK_REALTIME)
168 return -EINVAL;
169 if (get_old_timespec32(&new_tp, tp))
170 return -EFAULT;
171
172 return do_sys_settimeofday64(&new_tp, NULL);
173 }
174
175 SYSCALL_DEFINE2(clock_gettime32, clockid_t, which_clock,
176 struct old_timespec32 __user *, tp)
177 {
178 int ret;
179 struct timespec64 kernel_tp;
180
181 ret = do_clock_gettime(which_clock, &kernel_tp);
182 if (ret)
183 return ret;
184
185 if (put_old_timespec32(&kernel_tp, tp))
186 return -EFAULT;
187 return 0;
188 }
189
190 SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
191 struct old_timespec32 __user *, tp)
192 {
193 struct timespec64 rtn_tp = {
194 .tv_sec = 0,
195 .tv_nsec = hrtimer_resolution,
196 };
197
198 switch (which_clock) {
199 case CLOCK_REALTIME:
200 case CLOCK_MONOTONIC:
201 case CLOCK_BOOTTIME:
202 if (put_old_timespec32(&rtn_tp, tp))
203 return -EFAULT;
204 return 0;
205 default:
206 return -EINVAL;
207 }
208 }
209
210 SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags,
211 struct old_timespec32 __user *, rqtp,
212 struct old_timespec32 __user *, rmtp)
213 {
214 struct timespec64 t;
215
216 switch (which_clock) {
217 case CLOCK_REALTIME:
218 case CLOCK_MONOTONIC:
219 case CLOCK_BOOTTIME:
220 break;
221 default:
222 return -EINVAL;
223 }
224
225 if (get_old_timespec32(&t, rqtp))
226 return -EFAULT;
227 if (!timespec64_valid(&t))
228 return -EINVAL;
229 if (flags & TIMER_ABSTIME)
230 rmtp = NULL;
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,
235 which_clock);
236 }
237 #endif