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authorDeepa Dinamani <deepa.kernel@gmail.com>2017-06-24 11:45:03 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-25 21:58:46 -0400
commitd5b7ffbfbdacc29e4db035f90665951668fa9c58 (patch)
treedcea264738eabb691f4239f7981040739230f683 /kernel
parentf59dd9c886acb3abb188e8e94a99436560976835 (diff)
time: introduce {get,put}_itimerspec64
As we change the user space type for the timerfd and posix timer functions to newer data types, we need some form of conversion helpers to avoid duplicating that logic. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/compat.c21
-rw-r--r--kernel/time/time.c30
2 files changed, 51 insertions, 0 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index 73f26ba44a8a..a350deda503a 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -586,6 +586,27 @@ int put_compat_itimerspec(struct compat_itimerspec __user *dst,
return 0;
}
+int get_compat_itimerspec64(struct itimerspec64 *its,
+ const struct compat_itimerspec __user *uits)
+{
+
+ if (__compat_get_timespec64(&its->it_interval, &uits->it_interval) ||
+ __compat_get_timespec64(&its->it_value, &uits->it_value))
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(get_compat_itimerspec64);
+
+int put_compat_itimerspec64(const struct itimerspec64 *its,
+ struct compat_itimerspec __user *uits)
+{
+ if (__compat_put_timespec64(&its->it_interval, &uits->it_interval) ||
+ __compat_put_timespec64(&its->it_value, &uits->it_value))
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(put_compat_itimerspec64);
+
/*
* We currently only need the following fields from the sigevent
* structure: sigev_value, sigev_signo, sig_notify and (sometimes
diff --git a/kernel/time/time.c b/kernel/time/time.c
index adb9853ca6b0..44a8c1402133 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -918,3 +918,33 @@ int put_timespec64(const struct timespec64 *ts,
return copy_to_user(uts, &kts, sizeof(kts)) ? -EFAULT : 0;
}
EXPORT_SYMBOL_GPL(put_timespec64);
+
+int get_itimerspec64(struct itimerspec64 *it,
+ const struct itimerspec __user *uit)
+{
+ int ret;
+
+ ret = get_timespec64(&it->it_interval, &uit->it_interval);
+ if (ret)
+ return ret;
+
+ ret = get_timespec64(&it->it_value, &uit->it_value);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(get_itimerspec64);
+
+int put_itimerspec64(const struct itimerspec64 *it,
+ struct itimerspec __user *uit)
+{
+ int ret;
+
+ ret = put_timespec64(&it->it_interval, &uit->it_interval);
+ if (ret)
+ return ret;
+
+ ret = put_timespec64(&it->it_value, &uit->it_value);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(put_itimerspec64);