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authorDeepa Dinamani <deepa.kernel@gmail.com>2018-03-13 21:03:26 -0700
committerArnd Bergmann <arnd@arndb.de>2018-04-19 13:30:14 +0200
commit1c68adf61e5845f3525522fa9c797ed370689c85 (patch)
tree9ac1a84153eaee003cf7d2e9fb8265739caec793 /kernel/time
parent0d55303c51a4f35f674617e415632d492b596c26 (diff)
downloadlinux-1c68adf61e5845f3525522fa9c797ed370689c85.tar.bz2
compat: Enable compat_get/put_timespec64 always
These functions are used in the repurposed compat syscalls to provide backward compatibility for using 32 bit time_t on 32 bit systems. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/time.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 3044d48ebe56..df61143a54f6 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -880,6 +880,50 @@ int put_timespec64(const struct timespec64 *ts,
}
EXPORT_SYMBOL_GPL(put_timespec64);
+int __compat_get_timespec64(struct timespec64 *ts64,
+ const struct compat_timespec __user *cts)
+{
+ struct compat_timespec ts;
+ int ret;
+
+ ret = copy_from_user(&ts, cts, sizeof(ts));
+ if (ret)
+ return -EFAULT;
+
+ ts64->tv_sec = ts.tv_sec;
+ ts64->tv_nsec = ts.tv_nsec;
+
+ return 0;
+}
+
+int __compat_put_timespec64(const struct timespec64 *ts64,
+ struct compat_timespec __user *cts)
+{
+ struct compat_timespec ts = {
+ .tv_sec = ts64->tv_sec,
+ .tv_nsec = ts64->tv_nsec
+ };
+ return copy_to_user(cts, &ts, sizeof(ts)) ? -EFAULT : 0;
+}
+
+int compat_get_timespec64(struct timespec64 *ts, const void __user *uts)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_from_user(ts, uts, sizeof(*ts)) ? -EFAULT : 0;
+ else
+ return __compat_get_timespec64(ts, uts);
+}
+EXPORT_SYMBOL_GPL(compat_get_timespec64);
+
+int compat_put_timespec64(const struct timespec64 *ts, void __user *uts)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_to_user(uts, ts, sizeof(*ts)) ? -EFAULT : 0;
+ else
+ return __compat_put_timespec64(ts, uts);
+}
+EXPORT_SYMBOL_GPL(compat_put_timespec64);
+
int get_itimerspec64(struct itimerspec64 *it,
const struct itimerspec __user *uit)
{