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authorArnd Bergmann <arnd@arndb.de>2018-07-13 12:52:28 +0200
committerArnd Bergmann <arnd@arndb.de>2018-08-27 14:48:48 +0200
commit9afc5eee65ca7d717a99d6fe8f4adfe32a40940a (patch)
tree4e5585234e71076c0a5a470b157e0b9de96b8da6 /kernel/time/time.c
parent33e26418193f58d1895f2f968e1953b1caf8deb7 (diff)
y2038: globally rename compat_time to old_time32
Christoph Hellwig suggested a slightly different path for handling backwards compatibility with the 32-bit time_t based system calls: Rather than simply reusing the compat_sys_* entry points on 32-bit architectures unchanged, we get rid of those entry points and the compat_time types by renaming them to something that makes more sense on 32-bit architectures (which don't have a compat mode otherwise), and then share the entry points under the new name with the 64-bit architectures that use them for implementing the compatibility. The following types and interfaces are renamed here, and moved from linux/compat_time.h to linux/time32.h: old new --- --- compat_time_t old_time32_t struct compat_timeval struct old_timeval32 struct compat_timespec struct old_timespec32 struct compat_itimerspec struct old_itimerspec32 ns_to_compat_timeval() ns_to_old_timeval32() get_compat_itimerspec64() get_old_itimerspec32() put_compat_itimerspec64() put_old_itimerspec32() compat_get_timespec64() get_old_timespec32() compat_put_timespec64() put_old_timespec32() As we already have aliases in place, this patch addresses only the instances that are relevant to the system call interface in particular, not those that occur in device drivers and other modules. Those will get handled separately, while providing the 64-bit version of the respective interfaces. I'm not renaming the timex, rusage and itimerval structures, as we are still debating what the new interface will look like, and whether we will need a replacement at all. This also doesn't change the names of the syscall entry points, which can be done more easily when we actually switch over the 32-bit architectures to use them, at that point we need to change COMPAT_SYSCALL_DEFINEx to SYSCALL_DEFINEx with a new name, e.g. with a _time32 suffix. Suggested-by: Christoph Hellwig <hch@infradead.org> Link: https://lore.kernel.org/lkml/20180705222110.GA5698@infradead.org/ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'kernel/time/time.c')
-rw-r--r--kernel/time/time.c58
1 files changed, 29 insertions, 29 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c
index de332250d6fa..f1983f468fe3 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -104,12 +104,12 @@ SYSCALL_DEFINE1(stime, time_t __user *, tptr)
#ifdef CONFIG_COMPAT
#ifdef __ARCH_WANT_COMPAT_SYS_TIME
-/* compat_time_t is a 32 bit "long" and needs to get converted. */
-COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc)
+/* old_time32_t is a 32 bit "long" and needs to get converted. */
+COMPAT_SYSCALL_DEFINE1(time, old_time32_t __user *, tloc)
{
- compat_time_t i;
+ old_time32_t i;
- i = (compat_time_t)ktime_get_real_seconds();
+ i = (old_time32_t)ktime_get_real_seconds();
if (tloc) {
if (put_user(i,tloc))
@@ -119,7 +119,7 @@ COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc)
return i;
}
-COMPAT_SYSCALL_DEFINE1(stime, compat_time_t __user *, tptr)
+COMPAT_SYSCALL_DEFINE1(stime, old_time32_t __user *, tptr)
{
struct timespec64 tv;
int err;
@@ -225,7 +225,7 @@ SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv,
}
#ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
+COMPAT_SYSCALL_DEFINE2(gettimeofday, struct old_timeval32 __user *, tv,
struct timezone __user *, tz)
{
if (tv) {
@@ -244,7 +244,7 @@ COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
return 0;
}
-COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
+COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv,
struct timezone __user *, tz)
{
struct timespec64 new_ts;
@@ -863,10 +863,10 @@ 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)
+int __get_old_timespec32(struct timespec64 *ts64,
+ const struct old_timespec32 __user *cts)
{
- struct compat_timespec ts;
+ struct old_timespec32 ts;
int ret;
ret = copy_from_user(&ts, cts, sizeof(ts));
@@ -879,33 +879,33 @@ int __compat_get_timespec64(struct timespec64 *ts64,
return 0;
}
-int __compat_put_timespec64(const struct timespec64 *ts64,
- struct compat_timespec __user *cts)
+int __put_old_timespec32(const struct timespec64 *ts64,
+ struct old_timespec32 __user *cts)
{
- struct compat_timespec ts = {
+ struct old_timespec32 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)
+int get_old_timespec32(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);
+ return __get_old_timespec32(ts, uts);
}
-EXPORT_SYMBOL_GPL(compat_get_timespec64);
+EXPORT_SYMBOL_GPL(get_old_timespec32);
-int compat_put_timespec64(const struct timespec64 *ts, void __user *uts)
+int put_old_timespec32(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);
+ return __put_old_timespec32(ts, uts);
}
-EXPORT_SYMBOL_GPL(compat_put_timespec64);
+EXPORT_SYMBOL_GPL(put_old_timespec32);
int get_itimerspec64(struct itimerspec64 *it,
const struct __kernel_itimerspec __user *uit)
@@ -937,23 +937,23 @@ int put_itimerspec64(const struct itimerspec64 *it,
}
EXPORT_SYMBOL_GPL(put_itimerspec64);
-int get_compat_itimerspec64(struct itimerspec64 *its,
- const struct compat_itimerspec __user *uits)
+int get_old_itimerspec32(struct itimerspec64 *its,
+ const struct old_itimerspec32 __user *uits)
{
- if (__compat_get_timespec64(&its->it_interval, &uits->it_interval) ||
- __compat_get_timespec64(&its->it_value, &uits->it_value))
+ if (__get_old_timespec32(&its->it_interval, &uits->it_interval) ||
+ __get_old_timespec32(&its->it_value, &uits->it_value))
return -EFAULT;
return 0;
}
-EXPORT_SYMBOL_GPL(get_compat_itimerspec64);
+EXPORT_SYMBOL_GPL(get_old_itimerspec32);
-int put_compat_itimerspec64(const struct itimerspec64 *its,
- struct compat_itimerspec __user *uits)
+int put_old_itimerspec32(const struct itimerspec64 *its,
+ struct old_itimerspec32 __user *uits)
{
- if (__compat_put_timespec64(&its->it_interval, &uits->it_interval) ||
- __compat_put_timespec64(&its->it_value, &uits->it_value))
+ if (__put_old_timespec32(&its->it_interval, &uits->it_interval) ||
+ __put_old_timespec32(&its->it_value, &uits->it_value))
return -EFAULT;
return 0;
}
-EXPORT_SYMBOL_GPL(put_compat_itimerspec64);
+EXPORT_SYMBOL_GPL(put_old_itimerspec32);