timex: use __kernel_timex internally

struct timex is not y2038 safe.
Replace all uses of timex with y2038 safe __kernel_timex.

Note that struct __kernel_timex is an ABI interface definition.
We could define a new structure based on __kernel_timex that
is only available internally instead. Right now, there isn't
a strong motivation for this as the structure is isolated to
a few defined struct timex interfaces and such a structure would
be exactly the same as struct timex.

The patch was generated by the following coccinelle script:

virtual patch

@depends on patch forall@
identifier ts;
expression e;
@@
(
- struct timex ts;
+ struct __kernel_timex ts;
|
- struct timex ts = {};
+ struct __kernel_timex ts = {};
|
- struct timex ts = e;
+ struct __kernel_timex ts = e;
|
- struct timex *ts;
+ struct __kernel_timex *ts;
|
(memset \| copy_from_user \| copy_to_user \)(...,
- sizeof(struct timex))
+ sizeof(struct __kernel_timex))
)

@depends on patch forall@
identifier ts;
identifier fn;
@@
fn(...,
- struct timex *ts,
+ struct __kernel_timex *ts,
...) {
...
}

@depends on patch forall@
identifier ts;
identifier fn;
@@
fn(...,
- struct timex *ts) {
+ struct __kernel_timex *ts) {
...
}

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: linux-alpha@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Deepa Dinamani 2018-07-02 22:44:21 -07:00 committed by Arnd Bergmann
parent 1a596398a3
commit ead25417f8
13 changed files with 38 additions and 35 deletions

View File

@ -1253,7 +1253,7 @@ struct timex32 {
SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
{
struct timex txc;
struct __kernel_timex txc;
int ret;
/* copy relevant bits of struct timex. */
@ -1270,7 +1270,8 @@ SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
(copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
offsetof(struct timex32, tick))) ||
(put_tv_to_tv32(&txc_p->time, &txc.time)))
(put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
(put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
return -EFAULT;
return ret;

View File

@ -548,7 +548,7 @@ SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
SYSCALL_DEFINE1(sparc_adjtimex, struct timex __user *, txc_p)
{
struct timex txc; /* Local copy of parameter */
struct timex *kt = (void *)&txc;
struct __kernel_timex *kt = (void *)&txc;
int ret;
/* Copy the user data space into the kernel copy
@ -572,7 +572,7 @@ SYSCALL_DEFINE1(sparc_adjtimex, struct timex __user *, txc_p)
SYSCALL_DEFINE2(sparc_clock_adjtime, const clockid_t, which_clock,struct timex __user *, txc_p)
{
struct timex txc; /* Local copy of parameter */
struct timex *kt = (void *)&txc;
struct __kernel_timex *kt = (void *)&txc;
int ret;
if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) {

View File

@ -124,7 +124,7 @@ static int ptp_clock_gettime(struct posix_clock *pc, struct timespec64 *tp)
return err;
}
static int ptp_clock_adjtime(struct posix_clock *pc, struct timex *tx)
static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
{
struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
struct ptp_clock_info *ops;

View File

@ -51,7 +51,7 @@ struct posix_clock;
struct posix_clock_operations {
struct module *owner;
int (*clock_adjtime)(struct posix_clock *pc, struct timex *tx);
int (*clock_adjtime)(struct posix_clock *pc, struct __kernel_timex *tx);
int (*clock_gettime)(struct posix_clock *pc, struct timespec64 *ts);

View File

@ -69,9 +69,9 @@ extern int get_old_itimerspec32(struct itimerspec64 *its,
const struct old_itimerspec32 __user *uits);
extern int put_old_itimerspec32(const struct itimerspec64 *its,
struct old_itimerspec32 __user *uits);
struct timex;
int get_old_timex32(struct timex *, const struct old_timex32 __user *);
int put_old_timex32(struct old_timex32 __user *, const struct timex *);
struct __kernel_timex;
int get_old_timex32(struct __kernel_timex *, const struct old_timex32 __user *);
int put_old_timex32(struct old_timex32 __user *, const struct __kernel_timex *);
#if __BITS_PER_LONG == 64

View File

@ -158,8 +158,8 @@ extern unsigned long tick_nsec; /* SHIFTED_HZ period (nsec) */
#define NTP_INTERVAL_FREQ (HZ)
#define NTP_INTERVAL_LENGTH (NSEC_PER_SEC/NTP_INTERVAL_FREQ)
extern int do_adjtimex(struct timex *);
extern int do_clock_adjtime(const clockid_t which_clock, struct timex * ktx);
extern int do_adjtimex(struct __kernel_timex *);
extern int do_clock_adjtime(const clockid_t which_clock, struct __kernel_timex * ktx);
extern void hardpps(const struct timespec64 *, const struct timespec64 *);

View File

@ -188,13 +188,13 @@ static inline int is_error_status(int status)
&& (status & (STA_PPSWANDER|STA_PPSERROR)));
}
static inline void pps_fill_timex(struct timex *txc)
static inline void pps_fill_timex(struct __kernel_timex *txc)
{
txc->ppsfreq = shift_right((pps_freq >> PPM_SCALE_INV_SHIFT) *
PPM_SCALE_INV, NTP_SCALE_SHIFT);
txc->jitter = pps_jitter;
if (!(time_status & STA_NANO))
txc->jitter /= NSEC_PER_USEC;
txc->jitter = pps_jitter / NSEC_PER_USEC;
txc->shift = pps_shift;
txc->stabil = pps_stabil;
txc->jitcnt = pps_jitcnt;
@ -220,7 +220,7 @@ static inline int is_error_status(int status)
return status & (STA_UNSYNC|STA_CLOCKERR);
}
static inline void pps_fill_timex(struct timex *txc)
static inline void pps_fill_timex(struct __kernel_timex *txc)
{
/* PPS is not implemented, so these are zero */
txc->ppsfreq = 0;
@ -633,7 +633,7 @@ void ntp_notify_cmos_timer(void)
/*
* Propagate a new txc->status value into the NTP state:
*/
static inline void process_adj_status(const struct timex *txc)
static inline void process_adj_status(const struct __kernel_timex *txc)
{
if ((time_status & STA_PLL) && !(txc->status & STA_PLL)) {
time_state = TIME_OK;
@ -656,7 +656,8 @@ static inline void process_adj_status(const struct timex *txc)
}
static inline void process_adjtimex_modes(const struct timex *txc, s32 *time_tai)
static inline void process_adjtimex_modes(const struct __kernel_timex *txc,
s32 *time_tai)
{
if (txc->modes & ADJ_STATUS)
process_adj_status(txc);
@ -707,7 +708,8 @@ static inline void process_adjtimex_modes(const struct timex *txc, s32 *time_tai
* adjtimex mainly allows reading (and writing, if superuser) of
* kernel time-keeping variables. used by xntpd.
*/
int __do_adjtimex(struct timex *txc, const struct timespec64 *ts, s32 *time_tai)
int __do_adjtimex(struct __kernel_timex *txc, const struct timespec64 *ts,
s32 *time_tai)
{
int result;
@ -729,7 +731,7 @@ int __do_adjtimex(struct timex *txc, const struct timespec64 *ts, s32 *time_tai)
txc->offset = shift_right(time_offset * NTP_INTERVAL_FREQ,
NTP_SCALE_SHIFT);
if (!(time_status & STA_NANO))
txc->offset /= NSEC_PER_USEC;
txc->offset = (u32)txc->offset / NSEC_PER_USEC;
}
result = time_state; /* mostly `TIME_OK' */
@ -754,7 +756,7 @@ int __do_adjtimex(struct timex *txc, const struct timespec64 *ts, s32 *time_tai)
txc->time.tv_sec = (time_t)ts->tv_sec;
txc->time.tv_usec = ts->tv_nsec;
if (!(time_status & STA_NANO))
txc->time.tv_usec /= NSEC_PER_USEC;
txc->time.tv_usec = ts->tv_nsec / NSEC_PER_USEC;
/* Handle leapsec adjustments */
if (unlikely(ts->tv_sec >= ntp_next_leap_sec)) {

View File

@ -8,6 +8,6 @@ extern void ntp_clear(void);
extern u64 ntp_tick_length(void);
extern ktime_t ntp_get_next_leap(void);
extern int second_overflow(time64_t secs);
extern int __do_adjtimex(struct timex *txc, const struct timespec64 *ts, s32 *time_tai);
extern int __do_adjtimex(struct __kernel_timex *txc, const struct timespec64 *ts, s32 *time_tai);
extern void __hardpps(const struct timespec64 *phase_ts, const struct timespec64 *raw_ts);
#endif /* _LINUX_NTP_INTERNAL_H */

View File

@ -228,7 +228,7 @@ static void put_clock_desc(struct posix_clock_desc *cd)
fput(cd->fp);
}
static int pc_clock_adjtime(clockid_t id, struct timex *tx)
static int pc_clock_adjtime(clockid_t id, struct __kernel_timex *tx)
{
struct posix_clock_desc cd;
int err;

View File

@ -179,7 +179,7 @@ static int posix_clock_realtime_set(const clockid_t which_clock,
}
static int posix_clock_realtime_adj(const clockid_t which_clock,
struct timex *t)
struct __kernel_timex *t)
{
return do_adjtimex(t);
}
@ -1047,7 +1047,7 @@ SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
return error;
}
int do_clock_adjtime(const clockid_t which_clock, struct timex * ktx)
int do_clock_adjtime(const clockid_t which_clock, struct __kernel_timex * ktx)
{
const struct k_clock *kc = clockid_to_kclock(which_clock);
@ -1062,7 +1062,7 @@ int do_clock_adjtime(const clockid_t which_clock, struct timex * ktx)
SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
struct timex __user *, utx)
{
struct timex ktx;
struct __kernel_timex ktx;
int err;
if (copy_from_user(&ktx, utx, sizeof(ktx)))
@ -1132,7 +1132,7 @@ COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock,
struct old_timex32 __user *, utp)
{
struct timex ktx;
struct __kernel_timex ktx;
int err;
err = get_old_timex32(&ktx, utp);

View File

@ -8,7 +8,7 @@ struct k_clock {
const struct timespec64 *tp);
int (*clock_get)(const clockid_t which_clock,
struct timespec64 *tp);
int (*clock_adj)(const clockid_t which_clock, struct timex *tx);
int (*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
int (*timer_create)(struct k_itimer *timer);
int (*nsleep)(const clockid_t which_clock, int flags,
const struct timespec64 *);

View File

@ -265,25 +265,25 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv,
SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p)
{
struct timex txc; /* Local copy of parameter */
struct __kernel_timex txc; /* Local copy of parameter */
int ret;
/* Copy the user data space into the kernel copy
* structure. But bear in mind that the structures
* may change
*/
if (copy_from_user(&txc, txc_p, sizeof(struct timex)))
if (copy_from_user(&txc, txc_p, sizeof(struct __kernel_timex)))
return -EFAULT;
ret = do_adjtimex(&txc);
return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret;
return copy_to_user(txc_p, &txc, sizeof(struct __kernel_timex)) ? -EFAULT : ret;
}
#ifdef CONFIG_COMPAT_32BIT_TIME
int get_old_timex32(struct timex *txc, const struct old_timex32 __user *utp)
int get_old_timex32(struct __kernel_timex *txc, const struct old_timex32 __user *utp)
{
struct old_timex32 tx32;
memset(txc, 0, sizeof(struct timex));
memset(txc, 0, sizeof(struct __kernel_timex));
if (copy_from_user(&tx32, utp, sizeof(struct old_timex32)))
return -EFAULT;
@ -311,7 +311,7 @@ int get_old_timex32(struct timex *txc, const struct old_timex32 __user *utp)
return 0;
}
int put_old_timex32(struct old_timex32 __user *utp, const struct timex *txc)
int put_old_timex32(struct old_timex32 __user *utp, const struct __kernel_timex *txc)
{
struct old_timex32 tx32;
@ -344,7 +344,7 @@ int put_old_timex32(struct old_timex32 __user *utp, const struct timex *txc)
COMPAT_SYSCALL_DEFINE1(adjtimex, struct old_timex32 __user *, utp)
{
struct timex txc;
struct __kernel_timex txc;
int err, ret;
err = get_old_timex32(&txc, utp);

View File

@ -2234,7 +2234,7 @@ ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq, ktime_t *offs_real,
/**
* timekeeping_validate_timex - Ensures the timex is ok for use in do_adjtimex
*/
static int timekeeping_validate_timex(const struct timex *txc)
static int timekeeping_validate_timex(const struct __kernel_timex *txc)
{
if (txc->modes & ADJ_ADJTIME) {
/* singleshot must not be used with any other mode bits */
@ -2300,7 +2300,7 @@ static int timekeeping_validate_timex(const struct timex *txc)
/**
* do_adjtimex() - Accessor function to NTP __do_adjtimex function
*/
int do_adjtimex(struct timex *txc)
int do_adjtimex(struct __kernel_timex *txc)
{
struct timekeeper *tk = &tk_core.timekeeper;
unsigned long flags;