]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Dummy stubs used when CONFIG_POSIX_TIMERS=n | |
3 | * | |
4 | * Created by: Nicolas Pitre, July 2016 | |
5 | * Copyright: (C) 2016 Linaro Limited | |
6 | * | |
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. | |
10 | */ | |
11 | ||
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> | |
21 | ||
22 | asmlinkage long sys_ni_posix_timers(void) | |
23 | { | |
24 | pr_err_once("process %d (%s) attempted a POSIX timer syscall " | |
25 | "while CONFIG_POSIX_TIMERS is not set\n", | |
26 | current->pid, current->comm); | |
27 | return -ENOSYS; | |
28 | } | |
29 | ||
30 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | |
31 | #define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers) | |
32 | ||
33 | SYS_NI(timer_create); | |
34 | SYS_NI(timer_gettime); | |
35 | SYS_NI(timer_getoverrun); | |
36 | SYS_NI(timer_settime); | |
37 | SYS_NI(timer_delete); | |
38 | SYS_NI(clock_adjtime); | |
39 | SYS_NI(getitimer); | |
40 | SYS_NI(setitimer); | |
41 | #ifdef __ARCH_WANT_SYS_ALARM | |
42 | SYS_NI(alarm); | |
43 | #endif | |
44 | ||
45 | /* | |
46 | * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC | |
47 | * as it is easy to remain compatible with little code. CLOCK_BOOTTIME | |
48 | * is also included for convenience as at least systemd uses it. | |
49 | */ | |
50 | ||
51 | SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, | |
52 | const struct timespec __user *, tp) | |
53 | { | |
54 | struct timespec64 new_tp; | |
55 | ||
56 | if (which_clock != CLOCK_REALTIME) | |
57 | return -EINVAL; | |
58 | if (get_timespec64(&new_tp, tp)) | |
59 | return -EFAULT; | |
60 | ||
61 | return do_sys_settimeofday64(&new_tp, NULL); | |
62 | } | |
63 | ||
64 | int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp) | |
65 | { | |
66 | switch (which_clock) { | |
67 | case CLOCK_REALTIME: | |
68 | ktime_get_real_ts64(tp); | |
69 | break; | |
70 | case CLOCK_MONOTONIC: | |
71 | ktime_get_ts64(tp); | |
72 | break; | |
73 | case CLOCK_BOOTTIME: | |
74 | get_monotonic_boottime64(tp); | |
75 | break; | |
76 | default: | |
77 | return -EINVAL; | |
78 | } | |
79 | ||
80 | return 0; | |
81 | } | |
82 | SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, | |
83 | struct timespec __user *, tp) | |
84 | { | |
85 | int ret; | |
86 | struct timespec64 kernel_tp; | |
87 | ||
88 | ret = do_clock_gettime(which_clock, &kernel_tp); | |
89 | if (ret) | |
90 | return ret; | |
91 | ||
92 | if (put_timespec64(&kernel_tp, tp)) | |
93 | return -EFAULT; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp) | |
98 | { | |
99 | struct timespec64 rtn_tp = { | |
100 | .tv_sec = 0, | |
101 | .tv_nsec = hrtimer_resolution, | |
102 | }; | |
103 | ||
104 | switch (which_clock) { | |
105 | case CLOCK_REALTIME: | |
106 | case CLOCK_MONOTONIC: | |
107 | case CLOCK_BOOTTIME: | |
108 | if (put_timespec64(&rtn_tp, tp)) | |
109 | return -EFAULT; | |
110 | return 0; | |
111 | default: | |
112 | return -EINVAL; | |
113 | } | |
114 | } | |
115 | ||
116 | SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, | |
117 | const struct timespec __user *, rqtp, | |
118 | struct timespec __user *, rmtp) | |
119 | { | |
120 | struct timespec64 t64; | |
121 | struct timespec t; | |
122 | ||
123 | switch (which_clock) { | |
124 | case CLOCK_REALTIME: | |
125 | case CLOCK_MONOTONIC: | |
126 | case CLOCK_BOOTTIME: | |
127 | break; | |
128 | default: | |
129 | return -EINVAL; | |
130 | } | |
131 | ||
132 | if (copy_from_user(&t, rqtp, sizeof (struct timespec))) | |
133 | return -EFAULT; | |
134 | t64 = timespec_to_timespec64(t); | |
135 | if (!timespec64_valid(&t64)) | |
136 | return -EINVAL; | |
137 | if (flags & TIMER_ABSTIME) | |
138 | rmtp = NULL; | |
139 | current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; | |
140 | current->restart_block.nanosleep.rmtp = rmtp; | |
141 | return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? | |
142 | HRTIMER_MODE_ABS : HRTIMER_MODE_REL, | |
143 | which_clock); | |
144 | } | |
145 | ||
146 | #ifdef CONFIG_COMPAT | |
147 | COMPAT_SYS_NI(timer_create); | |
148 | COMPAT_SYS_NI(clock_adjtime); | |
149 | COMPAT_SYS_NI(timer_settime); | |
150 | COMPAT_SYS_NI(timer_gettime); | |
151 | COMPAT_SYS_NI(getitimer); | |
152 | COMPAT_SYS_NI(setitimer); | |
153 | ||
154 | COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, | |
155 | struct compat_timespec __user *, tp) | |
156 | { | |
157 | struct timespec64 new_tp; | |
158 | ||
159 | if (which_clock != CLOCK_REALTIME) | |
160 | return -EINVAL; | |
161 | if (compat_get_timespec64(&new_tp, tp)) | |
162 | return -EFAULT; | |
163 | ||
164 | return do_sys_settimeofday64(&new_tp, NULL); | |
165 | } | |
166 | ||
167 | COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, | |
168 | struct compat_timespec __user *, tp) | |
169 | { | |
170 | int ret; | |
171 | struct timespec64 kernel_tp; | |
172 | ||
173 | ret = do_clock_gettime(which_clock, &kernel_tp); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
177 | if (compat_put_timespec64(&kernel_tp, tp)) | |
178 | return -EFAULT; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, | |
183 | struct compat_timespec __user *, tp) | |
184 | { | |
185 | struct timespec64 rtn_tp = { | |
186 | .tv_sec = 0, | |
187 | .tv_nsec = hrtimer_resolution, | |
188 | }; | |
189 | ||
190 | switch (which_clock) { | |
191 | case CLOCK_REALTIME: | |
192 | case CLOCK_MONOTONIC: | |
193 | case CLOCK_BOOTTIME: | |
194 | if (compat_put_timespec64(&rtn_tp, tp)) | |
195 | return -EFAULT; | |
196 | return 0; | |
197 | default: | |
198 | return -EINVAL; | |
199 | } | |
200 | } | |
201 | ||
202 | COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, | |
203 | struct compat_timespec __user *, rqtp, | |
204 | struct compat_timespec __user *, rmtp) | |
205 | { | |
206 | struct timespec64 t64; | |
207 | struct timespec t; | |
208 | ||
209 | switch (which_clock) { | |
210 | case CLOCK_REALTIME: | |
211 | case CLOCK_MONOTONIC: | |
212 | case CLOCK_BOOTTIME: | |
213 | break; | |
214 | default: | |
215 | return -EINVAL; | |
216 | } | |
217 | ||
218 | if (compat_get_timespec(&t, rqtp)) | |
219 | return -EFAULT; | |
220 | t64 = timespec_to_timespec64(t); | |
221 | if (!timespec64_valid(&t64)) | |
222 | return -EINVAL; | |
223 | if (flags & TIMER_ABSTIME) | |
224 | rmtp = NULL; | |
225 | current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; | |
226 | current->restart_block.nanosleep.compat_rmtp = rmtp; | |
227 | return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? | |
228 | HRTIMER_MODE_ABS : HRTIMER_MODE_REL, | |
229 | which_clock); | |
230 | } | |
231 | #endif |