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time: Enable get/put_compat_itimerspec64 always

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This will aid in enabling the compat syscalls on 32-bit architectures later
on.

Also move compat_itimerspec and related defines to compat_time.h.  The
compat_time.h file will eventually be deleted.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: viro@zeniv.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Cc: y2038@lists.linaro.org
Link: https://lkml.kernel.org/r/20180617051144.29756-3-deepa.kernel@gmail.com
This commit is contained in:
Deepa Dinamani 2018-06-16 22:11:43 -07:00 committed by Thomas Gleixner
parent d0dd63a8ae
commit afef05cf23
4 changed files with 30 additions and 38 deletions
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9
include/linux/compat.h
View File

@ -109,11 +109,6 @@ typedef compat_ulong_t compat_aio_context_t;
struct compat_sel_arg_struct;
struct rusage;
struct compat_itimerspec {
struct compat_timespec it_interval;
struct compat_timespec it_value;
};
struct compat_utimbuf {
compat_time_t actime;
compat_time_t modtime;
@ -294,10 +289,6 @@ extern int compat_get_timespec(struct timespec *, const void __user *);
extern int compat_put_timespec(const struct timespec *, void __user *);
extern int compat_get_timeval(struct timeval *, const void __user *);
extern int compat_put_timeval(const struct timeval *, void __user *);
extern int get_compat_itimerspec64(struct itimerspec64 *its,
const struct compat_itimerspec __user *uits);
extern int put_compat_itimerspec64(const struct itimerspec64 *its,
struct compat_itimerspec __user *uits);
struct compat_iovec {
compat_uptr_t iov_base;

9
include/linux/compat_time.h
View File

@ -17,7 +17,16 @@ struct compat_timeval {
s32 tv_usec;
};
struct compat_itimerspec {
struct compat_timespec it_interval;
struct compat_timespec it_value;
};
extern int compat_get_timespec64(struct timespec64 *, const void __user *);
extern int compat_put_timespec64(const struct timespec64 *, void __user *);
extern int get_compat_itimerspec64(struct itimerspec64 *its,
const struct compat_itimerspec __user *uits);
extern int put_compat_itimerspec64(const struct itimerspec64 *its,
struct compat_itimerspec __user *uits);
#endif /* _LINUX_COMPAT_TIME_H */

29
kernel/compat.c
View File

@ -324,35 +324,6 @@ COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t, pid, unsigned int, len,
return ret;
}
/* Todo: Delete these extern declarations when get/put_compat_itimerspec64()
* are moved to kernel/time/time.c .
*/
extern int __compat_get_timespec64(struct timespec64 *ts64,
const struct compat_timespec __user *cts);
extern int __compat_put_timespec64(const struct timespec64 *ts64,
struct compat_timespec __user *cts);
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

21
kernel/time/time.c
View File

@ -955,3 +955,24 @@ int put_itimerspec64(const struct itimerspec64 *it,
return ret;
}
EXPORT_SYMBOL_GPL(put_itimerspec64);
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);