Y2038

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[PATCH v2 07/15] time:Introduce the do_sys_settimeofday64() function with timespec64 type

by Baolin Wang

This patch introduces the do_sys_settimeofday64() function with timespec64 type, that makes this function ready for 2038 issue when setting the time of day. And moves the do_sys_settimeofday() function to the timekeeping.h file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/timekeeping.h | 12 ++++++++++-- kernel/time/time.c | 10 ++++++---- 2 files changed, 16 insertions(+), 6 deletions(-) diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index c6d5ae9..89beb62 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -11,8 +11,16 @@ extern int timekeeping_suspended; */ extern void do_gettimeofday(struct timeval *tv); extern int do_settimeofday64(const struct timespec64 *ts); -extern int do_sys_settimeofday(const struct timespec *tv, - const struct timezone *tz); +extern int do_sys_settimeofday64(const struct timespec64 *tv, + const struct timezone *tz); +static inline int do_sys_settimeofday(const struct timespec *tv, + const struct timezone *tz) +{ + struct timespec64 ts64; + + ts64 = timespec_to_timespec64(*tv); + return do_sys_settimeofday64(&ts64, tz); +} /* * Kernel time accessors diff --git a/kernel/time/time.c b/kernel/time/time.c index 2c85b77..f43011b 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -160,15 +160,17 @@ static inline void warp_clock(void) * various programs will get confused when the clock gets warped. */ -int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz) +int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz) { static int firsttime = 1; int error = 0; + struct timespec ts; - if (tv && !timespec_valid(tv)) + if (tv && !timespec64_valid(tv)) return -EINVAL; - error = security_settime(tv, tz); + ts = timespec64_to_timespec(*tv); + error = security_settime(&ts, tz); if (error) return error; @@ -182,7 +184,7 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz) } } if (tv) - return do_settimeofday(tv); + return do_settimeofday64(tv); return 0; } -- 1.7.9.5

9 years, 6 months

[PATCH v2 06/15] posix-timers:Convert to the 64bit methods for the syscall function

by Baolin Wang

This patch converts to the 64bit methods with timespec64/itimerspec64 type for the syscall function, and changes the syscall implementation according to the CONFIG_64BIT macro. Also introduces some default functions with timespec64/itimerspec64 type for the 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 166 +++++++++++++++++++++++++++++++++++++------- 1 file changed, 141 insertions(+), 25 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 0db7f02..4c7c7d3 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -140,6 +140,7 @@ static int common_timer_del(struct k_itimer *timer); static enum hrtimer_restart posix_timer_fn(struct hrtimer *data); static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags); +static struct k_clock *clockid_to_kclock(const clockid_t id); #define lock_timer(tid, flags) \ ({ struct k_itimer *__timr; \ @@ -513,6 +514,57 @@ static struct pid *good_sigevent(sigevent_t * event) return task_pid(rtn); } +static int default_timer_get64(struct k_itimer *timr, + struct itimerspec64 *cur_setting64) +{ + struct itimerspec cur_setting; + struct k_clock *kc = clockid_to_kclock(timr->it_clock); + + kc->timer_get(timr, &cur_setting); + return 0; +} + +static int default_timer_set64(struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting64, + struct itimerspec64 *old_setting64) +{ + struct k_clock *kc = clockid_to_kclock(timr->it_clock); + struct itimerspec new_setting, old_setting; + + kc->timer_set(timr, flags, &new_setting, &old_setting); + return 0; +} + +static int default_clock_set64(const clockid_t which_clock, + const struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + + kc->clock_set(which_clock, &tp); + return 0; +} + +static int default_clock_get64(const clockid_t which_clock, + struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + + kc->clock_get(which_clock, &tp); + return 0; +} + +static int default_clock_getres64(const clockid_t which_clock, + struct timespec64 *tp64) +{ + struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec tp; + + kc->clock_getres(which_clock, &tp); + return 0; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -522,17 +574,28 @@ void posix_timers_register_clock(const clockid_t clock_id, return; } - if (!new_clock->clock_get) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_get()\n", + if (!new_clock->clock_get && !new_clock->clock_get64) { + printk(KERN_WARNING "POSIX clock id %d lacks clock_get() and clock_get64()\n", clock_id); return; } - if (!new_clock->clock_getres) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_getres()\n", + if (!new_clock->clock_getres && !new_clock->clock_getres64) { + printk(KERN_WARNING "POSIX clock id %d lacks clock_getres() and clock_getres64()\n", clock_id); return; } + if (new_clock->timer_get && !new_clock->timer_get64) + new_clock->timer_get64 = default_timer_get64; + if (new_clock->timer_set && !new_clock->timer_set64) + new_clock->timer_set64 = default_timer_set64; + if (new_clock->clock_set && !new_clock->clock_set64) + new_clock->clock_set64 = default_clock_set64; + if (new_clock->clock_get && !new_clock->clock_get64) + new_clock->clock_get64 = default_clock_get64; + if (new_clock->clock_getres && !new_clock->clock_getres64) + new_clock->clock_getres64 = default_clock_getres64; + posix_clocks[clock_id] = *new_clock; } EXPORT_SYMBOL_GPL(posix_timers_register_clock); @@ -579,7 +642,8 @@ static struct k_clock *clockid_to_kclock(const clockid_t id) return (id & CLOCKFD_MASK) == CLOCKFD ? &clock_posix_dynamic : &clock_posix_cpu; - if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres) + if (id >= MAX_CLOCKS || (!posix_clocks[id].clock_getres + && !posix_clocks[id].clock_getres64)) return NULL; return &posix_clocks[id]; } @@ -766,7 +830,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) cur_setting->it_value = ktime_to_timespec(remaining); } -static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) +static int __timer_gettime(timer_t timer_id, struct itimerspec64 *cur_setting) { struct k_itimer *timr; struct k_clock *kc; @@ -778,10 +842,10 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) return -EINVAL; kc = clockid_to_kclock(timr->it_clock); - if (WARN_ON_ONCE(!kc || !kc->timer_get)) + if (WARN_ON_ONCE(!kc || !kc->timer_get64)) ret = -EINVAL; else - kc->timer_get(timr, cur_setting); + kc->timer_get64(timr, cur_setting); unlock_timer(timr, flags); return ret; @@ -791,8 +855,17 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, struct itimerspec __user *, setting) { - struct itimerspec cur_setting; +#ifdef CONFIG_64BIT + struct itimerspec64 cur_setting; int ret = __timer_gettime(timer_id, &cur_setting); +#else + struct itimerspec64 cur_setting64; + struct itimerspec cur_setting; + int ret = __timer_gettime(timer_id, &cur_setting64); + + if (!ret) + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); +#endif if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting))) return -EFAULT; @@ -876,8 +949,8 @@ common_timer_set(struct k_itimer *timr, int flags, return 0; } -static int __timer_settime(timer_t timer_id, int flags, struct itimerspec *new_spec, - struct itimerspec *old_spec) +static int __timer_settime(timer_t timer_id, int flags, struct itimerspec64 *new_spec, + struct itimerspec64 *old_spec) { struct k_itimer *timr; int error = 0; @@ -890,10 +963,10 @@ retry: return -EINVAL; kc = clockid_to_kclock(timr->it_clock); - if (WARN_ON_ONCE(!kc || !kc->timer_set)) + if (WARN_ON_ONCE(!kc || !kc->timer_set64)) error = -EINVAL; else - error = kc->timer_set(timr, flags, new_spec, old_spec); + error = kc->timer_set64(timr, flags, new_spec, old_spec); unlock_timer(timr, flag); if (error == TIMER_RETRY) { @@ -909,9 +982,16 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, const struct itimerspec __user *, new_setting, struct itimerspec __user *, old_setting) { - struct itimerspec new_spec, old_spec; int error = 0; +#ifdef CONFIG_64BIT + struct itimerspec64 new_spec, old_spec; + struct itimerspec64 *rtn = old_setting ? &old_spec : NULL; +#else + struct itimerspec new_spec, old_spec; struct itimerspec *rtn = old_setting ? &old_spec : NULL; + struct itimerspec64 new_spec64; + struct itimerspec64 *rtn64; +#endif if (!new_setting) return -EINVAL; @@ -923,7 +1003,17 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, !timespec_valid(&new_spec.it_value)) return -EINVAL; +#ifdef CONFIG_64BIT error = __timer_settime(timer_id, flags, &new_spec, rtn); +#else + new_spec64 = itimerspec_to_itimerspec64(&new_spec); + if (rtn) + *rtn64 = itimerspec_to_itimerspec64(rtn); + else + rtn64 = NULL; + + error = __timer_settime(timer_id, flags, &new_spec64, rtn64); +#endif if (old_setting && !error && copy_to_user(old_setting, &old_spec, sizeof (old_spec))) @@ -1019,44 +1109,62 @@ void exit_itimers(struct signal_struct *sig) } } -static int __clock_settime(clockid_t which_clock, struct timespec *ts) +static int __clock_settime(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - if (!kc || !kc->clock_set) + if (!kc || !kc->clock_set64) return -EINVAL; - return kc->clock_set(which_clock, ts); + return kc->clock_set64(which_clock, ts); } SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, const struct timespec __user *, tp) { +#ifdef CONFIG_64BIT + struct timespec64 new_tp; +#else struct timespec new_tp; + struct timespec64 new_tp64; +#endif if (copy_from_user(&new_tp, tp, sizeof (*tp))) return -EFAULT; +#ifdef CONFIG_64BIT return __clock_settime(which_clock, &new_tp); +#else + new_tp64 = timespec_to_timespec64(new_tp); + return __clock_settime(which_clock, &new_tp64); +#endif } -static int __clock_gettime(clockid_t which_clock, struct timespec *ts) +static int __clock_gettime(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); if (!kc) return -EINVAL; - return kc->clock_get(which_clock, ts); + return kc->clock_get64(which_clock, ts); } SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, struct timespec __user *,tp) { - struct timespec kernel_tp; int error; - +#ifdef CONFIG_64BIT + struct timespec64 kernel_tp; error = __clock_gettime(which_clock, &kernel_tp); +#else + struct timespec64 kernel_tp64; + struct timespec kernel_tp; + + error = __clock_gettime(which_clock, &kernel_tp64); + if (!error) + kernel_tp = timespec64_to_timespec(kernel_tp64); +#endif if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) error = -EFAULT; @@ -1087,23 +1195,31 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } -static int __clock_getres(clockid_t which_clock, struct timespec *ts) +static int __clock_getres(clockid_t which_clock, struct timespec64 *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); if (!kc) return -EINVAL; - return kc->clock_getres(which_clock, ts); + return kc->clock_getres64(which_clock, ts); } SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp) { - struct timespec rtn_tp; int error; - +#ifdef CONFIG_64BIT + struct timespec64 rtn_tp; error = __clock_getres(which_clock, &rtn_tp); +#else + struct timespec64 rtn_tp64; + struct timespec rtn_tp; + + error = __clock_getres(which_clock, &rtn_tp64); + if (!error) + rtn_tp = timespec64_to_timespec(rtn_tp64); +#endif if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) error = -EFAULT; -- 1.7.9.5

9 years, 6 months

[PATCH v2 05/15] posix-timers:Split out the guts of the syscall and change the implementation

by Baolin Wang

This patch splits out the guts of the syscall and changes the syscall implementation to prepare the converting to 64bit methods for the syscall function in posix-timers.c file. And next patch will convert the syscall to 64bit methods with timespec64/itimerspec64 type. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- kernel/time/posix-timers.c | 107 +++++++++++++++++++++++++++++--------------- 1 file changed, 71 insertions(+), 36 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 31ea01f..0db7f02 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -766,11 +766,8 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) cur_setting->it_value = ktime_to_timespec(remaining); } -/* Get the time remaining on a POSIX.1b interval timer. */ -SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, - struct itimerspec __user *, setting) +static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting) { - struct itimerspec cur_setting; struct k_itimer *timr; struct k_clock *kc; unsigned long flags; @@ -784,9 +781,18 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, if (WARN_ON_ONCE(!kc || !kc->timer_get)) ret = -EINVAL; else - kc->timer_get(timr, &cur_setting); + kc->timer_get(timr, cur_setting); unlock_timer(timr, flags); + return ret; +} + +/* Get the time remaining on a POSIX.1b interval timer. */ +SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct itimerspec __user *, setting) +{ + struct itimerspec cur_setting; + int ret = __timer_gettime(timer_id, &cur_setting); if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting))) return -EFAULT; @@ -870,27 +876,14 @@ common_timer_set(struct k_itimer *timr, int flags, return 0; } -/* Set a POSIX.1b interval timer */ -SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, - const struct itimerspec __user *, new_setting, - struct itimerspec __user *, old_setting) +static int __timer_settime(timer_t timer_id, int flags, struct itimerspec *new_spec, + struct itimerspec *old_spec) { struct k_itimer *timr; - struct itimerspec new_spec, old_spec; int error = 0; unsigned long flag; - struct itimerspec *rtn = old_setting ? &old_spec : NULL; struct k_clock *kc; - if (!new_setting) - return -EINVAL; - - if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) - return -EFAULT; - - if (!timespec_valid(&new_spec.it_interval) || - !timespec_valid(&new_spec.it_value)) - return -EINVAL; retry: timr = lock_timer(timer_id, &flag); if (!timr) @@ -900,14 +893,38 @@ retry: if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; else - error = kc->timer_set(timr, flags, &new_spec, rtn); + error = kc->timer_set(timr, flags, new_spec, old_spec); unlock_timer(timr, flag); if (error == TIMER_RETRY) { - rtn = NULL; // We already got the old time... + old_spec = NULL; // We already got the old time... goto retry; } + return error; +} + +/* Set a POSIX.1b interval timer */ +SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + const struct itimerspec __user *, new_setting, + struct itimerspec __user *, old_setting) +{ + struct itimerspec new_spec, old_spec; + int error = 0; + struct itimerspec *rtn = old_setting ? &old_spec : NULL; + + if (!new_setting) + return -EINVAL; + + if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) + return -EFAULT; + + if (!timespec_valid(&new_spec.it_interval) || + !timespec_valid(&new_spec.it_value)) + return -EINVAL; + + error = __timer_settime(timer_id, flags, &new_spec, rtn); + if (old_setting && !error && copy_to_user(old_setting, &old_spec, sizeof (old_spec))) error = -EFAULT; @@ -1002,32 +1019,44 @@ void exit_itimers(struct signal_struct *sig) } } -SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, - const struct timespec __user *, tp) +static int __clock_settime(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec new_tp; if (!kc || !kc->clock_set) return -EINVAL; + return kc->clock_set(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, + const struct timespec __user *, tp) +{ + struct timespec new_tp; + if (copy_from_user(&new_tp, tp, sizeof (*tp))) return -EFAULT; - return kc->clock_set(which_clock, &new_tp); + return __clock_settime(which_clock, &new_tp); } -SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, - struct timespec __user *,tp) +static int __clock_gettime(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec kernel_tp; - int error; if (!kc) return -EINVAL; - error = kc->clock_get(which_clock, &kernel_tp); + return kc->clock_get(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, + struct timespec __user *,tp) +{ + struct timespec kernel_tp; + int error; + + error = __clock_gettime(which_clock, &kernel_tp); if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) error = -EFAULT; @@ -1058,17 +1087,23 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } -SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, - struct timespec __user *, tp) +static int __clock_getres(clockid_t which_clock, struct timespec *ts) { struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec rtn_tp; - int error; if (!kc) return -EINVAL; - error = kc->clock_getres(which_clock, &rtn_tp); + return kc->clock_getres(which_clock, ts); +} + +SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, + struct timespec __user *, tp) +{ + struct timespec rtn_tp; + int error; + + error = __clock_getres(which_clock, &rtn_tp); if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) error = -EFAULT; -- 1.7.9.5

9 years, 6 months

[PATCH v2 03/15] time/hrtimer:Introduce hrtimer_get_res64() with timespec64 type for getting the timer resolution

by Baolin Wang

This patch introduces hrtimer_get_res64() function to get the timer resolution with timespec64 type, and moves the hrtimer_get_res() function into include/linux/hrtimer.h as a 'static inline' helper that just calls hrtimer_get_res64. It is ready for 2038 year when getting the timer resolution by hrtimer_get_res64() function with timespec64 type, and it is convenient to delete the old hrtimer_get_res() function in hrtimer.h file. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/hrtimer.h | 12 +++++++++++- kernel/time/hrtimer.c | 10 +++++----- 2 files changed, 16 insertions(+), 6 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 05f6df1..ee8ed44 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -383,7 +383,17 @@ static inline int hrtimer_restart(struct hrtimer *timer) /* Query timers: */ extern ktime_t hrtimer_get_remaining(const struct hrtimer *timer); -extern int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp); +extern int hrtimer_get_res64(const clockid_t which_clock, + struct timespec64 *tp); + +static inline int hrtimer_get_res(const clockid_t which_clock, + struct timespec *tp) +{ + struct timespec64 *ts64; + + *ts64 = timespec_to_timespec64(*tp); + return hrtimer_get_res64(which_clock, ts64); +} extern ktime_t hrtimer_get_next_event(void); diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index bee0c1f..508d936 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1175,24 +1175,24 @@ void hrtimer_init(struct hrtimer *timer, clockid_t clock_id, EXPORT_SYMBOL_GPL(hrtimer_init); /** - * hrtimer_get_res - get the timer resolution for a clock + * hrtimer_get_res64 - get the timer resolution for a clock * @which_clock: which clock to query - * @tp: pointer to timespec variable to store the resolution + * @tp: pointer to timespec64 variable to store the resolution * * Store the resolution of the clock selected by @which_clock in the * variable pointed to by @tp. */ -int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp) +int hrtimer_get_res64(const clockid_t which_clock, struct timespec64 *tp) { struct hrtimer_cpu_base *cpu_base; int base = hrtimer_clockid_to_base(which_clock); cpu_base = raw_cpu_ptr(&hrtimer_bases); - *tp = ktime_to_timespec(cpu_base->clock_base[base].resolution); + *tp = ktime_to_timespec64(cpu_base->clock_base[base].resolution); return 0; } -EXPORT_SYMBOL_GPL(hrtimer_get_res); +EXPORT_SYMBOL_GPL(hrtimer_get_res64); static void __run_hrtimer(struct hrtimer *timer, ktime_t *now) { -- 1.7.9.5

9 years, 6 months

[PATCH v2 02/15] timekeeping:Introduce the current_kernel_time64() function with timespec64 type

by Baolin Wang

This patch adds current_kernel_time64() function with timespec64 type, and makes current_kernel_time() 'static inline' and moves it to timekeeping.h file. It is convenient for user to get the current kernel time with timespec64 type, and delete the current_kernel_time() function easily in timekeeping.h file. That is ready for 2038 when get the current time. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/timekeeping.h | 10 +++++++++- kernel/time/timekeeping.c | 6 +++--- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 3eaae47..c6d5ae9 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -18,10 +18,18 @@ extern int do_sys_settimeofday(const struct timespec *tv, * Kernel time accessors */ unsigned long get_seconds(void); -struct timespec current_kernel_time(void); +struct timespec64 current_kernel_time64(void); /* does not take xtime_lock */ struct timespec __current_kernel_time(void); +static inline struct timespec current_kernel_time(void) +{ + struct timespec64 now; + + now = current_kernel_time64(); + return timespec64_to_timespec(now); +} + /* * timespec based interfaces */ diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 91db941..8ccc02c 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1721,7 +1721,7 @@ struct timespec __current_kernel_time(void) return timespec64_to_timespec(tk_xtime(tk)); } -struct timespec current_kernel_time(void) +struct timespec64 current_kernel_time64(void) { struct timekeeper *tk = &tk_core.timekeeper; struct timespec64 now; @@ -1733,9 +1733,9 @@ struct timespec current_kernel_time(void) now = tk_xtime(tk); } while (read_seqcount_retry(&tk_core.seq, seq)); - return timespec64_to_timespec(now); + return now; } -EXPORT_SYMBOL(current_kernel_time); +EXPORT_SYMBOL(current_kernel_time64); struct timespec64 get_monotonic_coarse64(void) { -- 1.7.9.5

9 years, 6 months

[PATCH v2 01/15] linux/time64.h:Introduce the 'struct itimerspec64' for 64bit

by Baolin Wang

This patch introduces the 'struct itimerspec64' for 64bit to replace itimerspec, and also introduces the conversion methods: itimerspec64_to_itimerspec() and itimerspec_to_itimerspec64(), that makes itimerspec ready for 2038 year. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/time64.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/include/linux/time64.h b/include/linux/time64.h index a383147..61dc4cb 100644 --- a/include/linux/time64.h +++ b/include/linux/time64.h @@ -11,11 +11,18 @@ typedef __s64 time64_t; */ #if __BITS_PER_LONG == 64 # define timespec64 timespec +#define itimerspec64 itimerspec #else struct timespec64 { time64_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ }; + +struct itimerspec64 { + struct timespec64 it_interval; /* timer period */ + struct timespec64 it_value; /* timer expiration */ +}; + #endif /* Parameters used to convert the timespec values: */ @@ -43,6 +50,16 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) return ts; } +static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64) +{ + return *its64; +} + +static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its) +{ + return *its; +} + # define timespec64_equal timespec_equal # define timespec64_compare timespec_compare # define set_normalized_timespec64 set_normalized_timespec @@ -75,6 +92,24 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) return ret; } +static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64) +{ + struct itimerspec ret; + + ret.it_interval = timespec64_to_timespec(its64->it_interval); + ret.it_value = timespec64_to_timespec(its64->it_value); + return ret; +} + +static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its) +{ + struct itimerspec64 ret; + + ret.it_interval = timespec_to_timespec64(its->it_interval); + ret.it_value = timespec_to_timespec64(its->it_value); + return ret; +} + static inline int timespec64_equal(const struct timespec64 *a, const struct timespec64 *b) { -- 1.7.9.5

9 years, 6 months

[PATCH v2 00/15] Convert the posix_clock_operations and k_clock structure to ready for 2038

by Baolin Wang

This patch series changes the 32-bit time type (timespec/itimerspec) to the 64-bit one (timespec64/itimerspec64), since 32-bit time types will break in the year 2038. This patch series introduces new methods with timespec64/itimerspec64 type, and removes the old ones with timespec/itimerspec type for posix_clock_operations and k_clock structure. Also introduces some new functions with timespec64/itimerspec64 type, like current_kernel_time64(), hrtimer_get_res64(), cputime_to_timespec64() and timespec64_to_cputime(). Changes since V1: -Split some patch into small patch. -Change the methods for converting the syscall and add some default function for new 64bit methods for syscall function. -Introduce the new function do_sys_settimeofday64() and move do_sys_settimeofday() function to head file. -Modify the EXPORT_SYMPOL issue. -Add new 64bit methods in cputime_nsecs.h file. -Modify some patch logs. Baolin Wang (15): linux/time64.h:Introduce the 'struct itimerspec64' for 64bit timekeeping:Introduce the current_kernel_time64() function with timespec64 type time/hrtimer:Introduce hrtimer_get_res64() with timespec64 type for getting the timer resolution posix timers:Introduce the 64bit methods with timespec64 type for k_clock structure posix-timers:Split out the guts of the syscall and change the implementation posix-timers:Convert to the 64bit methods for the syscall function time:Introduce the do_sys_settimeofday64() function with timespec64 type time/posix-timers:Convert to the 64bit methods for k_clock callback functions char/mmtimer:Convert to the 64bit methods for k_clock callback function time/alarmtimer:Convert to the new methods for k_clock structure time/posix-clock:Convert to the 64bit methods for k_clock and posix_clock_operations structure time/time:Introduce the timespec64_to_jiffies/jiffies_to_timespec64 function cputime:Introduce the cputime_to_timespec64/timespec64_to_cputime function time/posix-cpu-timers:Convert to the 64bit methods for k_clock structure k_clock:Remove the 32bit methods with timespec/itimerspec type arch/powerpc/include/asm/cputime.h | 6 +- arch/s390/include/asm/cputime.h | 8 +- drivers/char/mmtimer.c | 36 +++-- drivers/ptp/ptp_clock.c | 26 +--- include/asm-generic/cputime_jiffies.h | 10 +- include/asm-generic/cputime_nsecs.h | 4 +- include/linux/cputime.h | 15 ++ include/linux/hrtimer.h | 12 +- include/linux/jiffies.h | 21 ++- include/linux/posix-clock.h | 10 +- include/linux/posix-timers.h | 18 +-- include/linux/time64.h | 35 +++++ include/linux/timekeeping.h | 26 +++- kernel/time/alarmtimer.c | 43 +++--- kernel/time/hrtimer.c | 10 +- kernel/time/posix-clock.c | 20 +-- kernel/time/posix-cpu-timers.c | 83 +++++----- kernel/time/posix-timers.c | 269 ++++++++++++++++++++++----------- kernel/time/time.c | 22 +-- kernel/time/timekeeping.c | 6 +- kernel/time/timekeeping.h | 2 +- 21 files changed, 428 insertions(+), 254 deletions(-) -- 1.7.9.5

9 years, 6 months

Re: [Y2038] [PATCH v1 00/15] Convert the posix_clock_operations and k_clock structure to ready for 2038

by Baolin Wang

On 30 April 2015 at 00:31, Mark Brown <broonie(a)kernel.org> wrote: > On Wed, Apr 29, 2015 at 06:04:58PM +0200, Arnd Bergmann wrote: > > On Wednesday 29 April 2015 22:55:23 Baolin Wang wrote: > > > Last time, you actually had more people than necessary on Cc, and that > can > > end up in spam filters. If someone is a maintainer for just one or two > patches > > out of the series, it can be better to add an explicit 'Cc: > person(a)example.org' > > statement in those patches, and not Cc them for the whole series. > > But do include people on the cover letter or otherwise make sure they've > got some idea what the series overall is all about (especially if > there's interdependencies) to avoid confusions. > Ok, Thanks for your suggestions, and i'll send out the patch series asap. -- Baolin.wang Best Regards

9 years, 6 months

[PATCH v3] Staging: rts5208: Replace timeval with timespec64

by Ksenija Stanojevic

struct timeval tv is used to get current time. 32-bit systems using 'struct timeval' will break in the year 2038, so we have to replace that code with more appropriate types. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic(a)gmail.com> --- Changes in v3: - introduce temporary variable tv_usec. Changes in v2: - use functions that uses real time clock. - do not change interface by removing timeval_buf. drivers/staging/rts5208/rtsx.h | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/staging/rts5208/rtsx.h b/drivers/staging/rts5208/rtsx.h index 9e6ecb7..f768fc0 100644 --- a/drivers/staging/rts5208/rtsx.h +++ b/drivers/staging/rts5208/rtsx.h @@ -37,7 +37,7 @@ #include <linux/cdrom.h> #include <linux/workqueue.h> #include <linux/timer.h> -#include <linux/time.h> +#include <linux/time64.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -151,21 +151,24 @@ static inline struct rtsx_dev *host_to_rtsx(struct Scsi_Host *host) static inline void get_current_time(u8 *timeval_buf, int buf_len) { - struct timeval tv; + struct timespec64 ts64; + u32 tv_usec; if (!timeval_buf || (buf_len < 8)) return; - do_gettimeofday(&tv); + getnstimeofday64(&ts64); - timeval_buf[0] = (u8)(tv.tv_sec >> 24); - timeval_buf[1] = (u8)(tv.tv_sec >> 16); - timeval_buf[2] = (u8)(tv.tv_sec >> 8); - timeval_buf[3] = (u8)(tv.tv_sec); - timeval_buf[4] = (u8)(tv.tv_usec >> 24); - timeval_buf[5] = (u8)(tv.tv_usec >> 16); - timeval_buf[6] = (u8)(tv.tv_usec >> 8); - timeval_buf[7] = (u8)(tv.tv_usec); + tv_usec = ts64.tv_nsec/NSEC_PER_USEC; + + timeval_buf[0] = (u8)(ts64.tv_sec >> 24); + timeval_buf[1] = (u8)(ts64.tv_sec >> 16); + timeval_buf[2] = (u8)(ts64.tv_sec >> 8); + timeval_buf[3] = (u8)(ts64.tv_sec); + timeval_buf[4] = (u8)(tv_usec >> 24); + timeval_buf[5] = (u8)(tv_usec >> 16); + timeval_buf[6] = (u8)(tv_usec >> 8); + timeval_buf[7] = (u8)(tv_usec); } /* The scsi_lock() and scsi_unlock() macros protect the sm_state and the -- 1.9.1

9 years, 6 months

[PATCH v2] Staging: rts5208: Replace timeval with timespec64

by Ksenija Stanojevic

struct timeval tv is used to get current time. 32-bit systems using 'struct timeval' will break in the year 2038, so we have to replace that code with more appropriate types. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic(a)gmail.com> --- Changes in v2: - use functions that uses real time clock. - do not change interface by removing timeval_buf. drivers/staging/rts5208/rtsx.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/staging/rts5208/rtsx.h b/drivers/staging/rts5208/rtsx.h index 9e6ecb7..7d44350 100644 --- a/drivers/staging/rts5208/rtsx.h +++ b/drivers/staging/rts5208/rtsx.h @@ -37,7 +37,7 @@ #include <linux/cdrom.h> #include <linux/workqueue.h> #include <linux/timer.h> -#include <linux/time.h> +#include <linux/time64.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -151,21 +151,21 @@ static inline struct rtsx_dev *host_to_rtsx(struct Scsi_Host *host) static inline void get_current_time(u8 *timeval_buf, int buf_len) { - struct timeval tv; + struct timespec64 ts64; if (!timeval_buf || (buf_len < 8)) return; - do_gettimeofday(&tv); + getnstimeofday64(&ts64); - timeval_buf[0] = (u8)(tv.tv_sec >> 24); - timeval_buf[1] = (u8)(tv.tv_sec >> 16); - timeval_buf[2] = (u8)(tv.tv_sec >> 8); - timeval_buf[3] = (u8)(tv.tv_sec); - timeval_buf[4] = (u8)(tv.tv_usec >> 24); - timeval_buf[5] = (u8)(tv.tv_usec >> 16); - timeval_buf[6] = (u8)(tv.tv_usec >> 8); - timeval_buf[7] = (u8)(tv.tv_usec); + timeval_buf[0] = (u8)(ts64.tv_sec >> 24); + timeval_buf[1] = (u8)(ts64.tv_sec >> 16); + timeval_buf[2] = (u8)(ts64.tv_sec >> 8); + timeval_buf[3] = (u8)(ts64.tv_sec); + timeval_buf[4] = (u8)(ts64.tv_nsec/NSEC_PER_USEC >> 24); + timeval_buf[5] = (u8)(ts64.tv_nsec/NSEC_PER_USEC >> 16); + timeval_buf[6] = (u8)(ts64.tv_nsec/NSEC_PER_USEC >> 8); + timeval_buf[7] = (u8)(ts64.tv_nsec/NSEC_PER_USEC); } /* The scsi_lock() and scsi_unlock() macros protect the sm_state and the -- 1.9.1

9 years, 6 months

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