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authorAl Viro <viro@zeniv.linux.org.uk>2017-06-07 09:42:38 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-06-14 00:00:44 +0200
commitd822cdcce43f9d4dcddbf9c68f9537d542ccc3c3 (patch)
treeff2193bf59468d50b3cc5f6300db6ed4b8f90d93 /kernel/time/posix-stubs.c
parent54ad9c46c262ce4a603dc7887e37956896a0211d (diff)
posix-timers: Move compat versions of clock_gettime/settime/getres
Move them to the native implementations and get rid of the set_fs() hackery. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-13-viro@ZenIV.linux.org.uk
Diffstat (limited to 'kernel/time/posix-stubs.c')
-rw-r--r--kernel/time/posix-stubs.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index 7f88517461e8..a375c31cb352 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -137,6 +137,59 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
}
#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
+ struct compat_timespec __user *, tp)
+{
+ struct timespec64 new_tp64;
+ struct timespec new_tp;
+
+ if (which_clock != CLOCK_REALTIME)
+ return -EINVAL;
+ if (compat_get_timespec(&new_tp, tp))
+ return -EFAULT;
+
+ new_tp64 = timespec_to_timespec64(new_tp);
+ return do_sys_settimeofday64(&new_tp64, NULL);
+}
+
+COMPAT_SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
+ struct compat_timespec __user *,tp)
+{
+ struct timespec64 kernel_tp64;
+ struct timespec kernel_tp;
+
+ switch (which_clock) {
+ case CLOCK_REALTIME: ktime_get_real_ts64(&kernel_tp64); break;
+ case CLOCK_MONOTONIC: ktime_get_ts64(&kernel_tp64); break;
+ case CLOCK_BOOTTIME: get_monotonic_boottime64(&kernel_tp64); break;
+ default: return -EINVAL;
+ }
+
+ kernel_tp = timespec64_to_timespec(kernel_tp64);
+ if (compat_put_timespec(&kernel_tp, tp))
+ return -EFAULT;
+ return 0;
+}
+
+COMPAT_SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
+ struct compat_timespec __user *, tp)
+{
+ struct timespec rtn_tp = {
+ .tv_sec = 0,
+ .tv_nsec = hrtimer_resolution,
+ };
+
+ switch (which_clock) {
+ case CLOCK_REALTIME:
+ case CLOCK_MONOTONIC:
+ case CLOCK_BOOTTIME:
+ if (compat_put_timespec(&rtn_tp, tp))
+ return -EFAULT;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
struct compat_timespec __user *, rqtp,
struct compat_timespec __user *, rmtp)