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Subject[PATCH 3/6] timex: prepare compat helpers for y2038 changes
Date
Move struct compat_timex to compat_time.h.
This is in line with other compat time structures that are planned
to be deprecated eventually.

Also enable compat_get/put_timex helpers unconditionally.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: linux-arch@vger.kernel.org
---
include/asm-generic/compat.h | 8 ++++-
include/linux/compat.h | 33 -------------------
include/linux/compat_time.h | 34 +++++++++++++++++++
kernel/compat.c | 63 ------------------------------------
kernel/time/time.c | 63 ++++++++++++++++++++++++++++++++++++
5 files changed, 104 insertions(+), 97 deletions(-)

diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index 28819451b6d1..d2876f43484f 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -1,3 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */

-/* This is an empty stub for 32-bit-only architectures */
+/* This is a stub for 32-bit-only architectures */
+
+#include <linux/types.h>
+
+typedef s32 compat_int_t;
+typedef s32 compat_long_t;
+typedef u32 compat_uint_t;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index df45ee8413d6..2ee58590aeae 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -19,8 +19,6 @@
#include <linux/uaccess.h>
#include <linux/unistd.h>

-#include <asm/compat.h>
-
#ifdef CONFIG_COMPAT
#include <asm/siginfo.h>
#include <asm/signal.h>
@@ -136,37 +134,6 @@ struct compat_tms {
compat_clock_t tms_cstime;
};

-struct compat_timex {
- compat_uint_t modes;
- compat_long_t offset;
- compat_long_t freq;
- compat_long_t maxerror;
- compat_long_t esterror;
- compat_int_t status;
- compat_long_t constant;
- compat_long_t precision;
- compat_long_t tolerance;
- struct compat_timeval time;
- compat_long_t tick;
- compat_long_t ppsfreq;
- compat_long_t jitter;
- compat_int_t shift;
- compat_long_t stabil;
- compat_long_t jitcnt;
- compat_long_t calcnt;
- compat_long_t errcnt;
- compat_long_t stbcnt;
- compat_int_t tai;
-
- compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
- compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
- compat_int_t:32; compat_int_t:32; compat_int_t:32;
-};
-
-struct timex;
-int compat_get_timex(struct timex *, const struct compat_timex __user *);
-int compat_put_timex(struct compat_timex __user *, const struct timex *);
-
#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)

typedef struct {
diff --git a/include/linux/compat_time.h b/include/linux/compat_time.h
index e70bfd1d2c3f..f04454e1b863 100644
--- a/include/linux/compat_time.h
+++ b/include/linux/compat_time.h
@@ -7,6 +7,9 @@

typedef s32 compat_time_t;

+/* TODO: Move to linux/compat.h when this file is deleted. */
+#include <asm/compat.h>
+
struct compat_timespec {
compat_time_t tv_sec;
s32 tv_nsec;
@@ -22,11 +25,42 @@ struct compat_itimerspec {
struct compat_timespec it_value;
};

+struct compat_timex {
+ compat_uint_t modes;
+ compat_long_t offset;
+ compat_long_t freq;
+ compat_long_t maxerror;
+ compat_long_t esterror;
+ compat_int_t status;
+ compat_long_t constant;
+ compat_long_t precision;
+ compat_long_t tolerance;
+ struct compat_timeval time;
+ compat_long_t tick;
+ compat_long_t ppsfreq;
+ compat_long_t jitter;
+ compat_int_t shift;
+ compat_long_t stabil;
+ compat_long_t jitcnt;
+ compat_long_t calcnt;
+ compat_long_t errcnt;
+ compat_long_t stbcnt;
+ compat_int_t tai;
+
+ compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
+ compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
+ compat_int_t:32; compat_int_t:32; compat_int_t:32;
+};
+
+
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);
+struct timex;
+int compat_get_timex(struct timex *, const struct compat_timex __user *);
+int compat_put_timex(struct compat_timex __user *, const struct timex *);

#endif /* _LINUX_COMPAT_TIME_H */
diff --git a/kernel/compat.c b/kernel/compat.c
index 8e40efc2928a..e1de768e5607 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -30,69 +30,6 @@

#include <linux/uaccess.h>

-int compat_get_timex(struct timex *txc, const struct compat_timex __user *utp)
-{
- struct compat_timex tx32;
-
- memset(txc, 0, sizeof(struct timex));
- if (copy_from_user(&tx32, utp, sizeof(struct compat_timex)))
- return -EFAULT;
-
- txc->modes = tx32.modes;
- txc->offset = tx32.offset;
- txc->freq = tx32.freq;
- txc->maxerror = tx32.maxerror;
- txc->esterror = tx32.esterror;
- txc->status = tx32.status;
- txc->constant = tx32.constant;
- txc->precision = tx32.precision;
- txc->tolerance = tx32.tolerance;
- txc->time.tv_sec = tx32.time.tv_sec;
- txc->time.tv_usec = tx32.time.tv_usec;
- txc->tick = tx32.tick;
- txc->ppsfreq = tx32.ppsfreq;
- txc->jitter = tx32.jitter;
- txc->shift = tx32.shift;
- txc->stabil = tx32.stabil;
- txc->jitcnt = tx32.jitcnt;
- txc->calcnt = tx32.calcnt;
- txc->errcnt = tx32.errcnt;
- txc->stbcnt = tx32.stbcnt;
-
- return 0;
-}
-
-int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc)
-{
- struct compat_timex tx32;
-
- memset(&tx32, 0, sizeof(struct compat_timex));
- tx32.modes = txc->modes;
- tx32.offset = txc->offset;
- tx32.freq = txc->freq;
- tx32.maxerror = txc->maxerror;
- tx32.esterror = txc->esterror;
- tx32.status = txc->status;
- tx32.constant = txc->constant;
- tx32.precision = txc->precision;
- tx32.tolerance = txc->tolerance;
- tx32.time.tv_sec = txc->time.tv_sec;
- tx32.time.tv_usec = txc->time.tv_usec;
- tx32.tick = txc->tick;
- tx32.ppsfreq = txc->ppsfreq;
- tx32.jitter = txc->jitter;
- tx32.shift = txc->shift;
- tx32.stabil = txc->stabil;
- tx32.jitcnt = txc->jitcnt;
- tx32.calcnt = txc->calcnt;
- tx32.errcnt = txc->errcnt;
- tx32.stbcnt = txc->stbcnt;
- tx32.tai = txc->tai;
- if (copy_to_user(utp, &tx32, sizeof(struct compat_timex)))
- return -EFAULT;
- return 0;
-}
-
static int __compat_get_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
{
return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
diff --git a/kernel/time/time.c b/kernel/time/time.c
index ccdb351277ee..c40cce820380 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -978,3 +978,66 @@ int put_compat_itimerspec64(const struct itimerspec64 *its,
return 0;
}
EXPORT_SYMBOL_GPL(put_compat_itimerspec64);
+
+int compat_get_timex(struct timex *txc, const struct compat_timex __user *utp)
+{
+ struct compat_timex tx32;
+
+ memset(txc, 0, sizeof(struct timex));
+ if (copy_from_user(&tx32, utp, sizeof(struct compat_timex)))
+ return -EFAULT;
+
+ txc->modes = tx32.modes;
+ txc->offset = tx32.offset;
+ txc->freq = tx32.freq;
+ txc->maxerror = tx32.maxerror;
+ txc->esterror = tx32.esterror;
+ txc->status = tx32.status;
+ txc->constant = tx32.constant;
+ txc->precision = tx32.precision;
+ txc->tolerance = tx32.tolerance;
+ txc->time.tv_sec = tx32.time.tv_sec;
+ txc->time.tv_usec = tx32.time.tv_usec;
+ txc->tick = tx32.tick;
+ txc->ppsfreq = tx32.ppsfreq;
+ txc->jitter = tx32.jitter;
+ txc->shift = tx32.shift;
+ txc->stabil = tx32.stabil;
+ txc->jitcnt = tx32.jitcnt;
+ txc->calcnt = tx32.calcnt;
+ txc->errcnt = tx32.errcnt;
+ txc->stbcnt = tx32.stbcnt;
+
+ return 0;
+}
+
+int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc)
+{
+ struct compat_timex tx32;
+
+ memset(&tx32, 0, sizeof(struct compat_timex));
+ tx32.modes = txc->modes;
+ tx32.offset = txc->offset;
+ tx32.freq = txc->freq;
+ tx32.maxerror = txc->maxerror;
+ tx32.esterror = txc->esterror;
+ tx32.status = txc->status;
+ tx32.constant = txc->constant;
+ tx32.precision = txc->precision;
+ tx32.tolerance = txc->tolerance;
+ tx32.time.tv_sec = txc->time.tv_sec;
+ tx32.time.tv_usec = txc->time.tv_usec;
+ tx32.tick = txc->tick;
+ tx32.ppsfreq = txc->ppsfreq;
+ tx32.jitter = txc->jitter;
+ tx32.shift = txc->shift;
+ tx32.stabil = txc->stabil;
+ tx32.jitcnt = txc->jitcnt;
+ tx32.calcnt = txc->calcnt;
+ tx32.errcnt = txc->errcnt;
+ tx32.stbcnt = txc->stbcnt;
+ tx32.tai = txc->tai;
+ if (copy_to_user(utp, &tx32, sizeof(struct compat_timex)))
+ return -EFAULT;
+ return 0;
+}
--
2.17.1
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