Y2038

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[PATCH] aoe: Use 64-bit timestamp in frame

by Tina Ruchandani

'struct frame' uses two variables to store the sent timestamp - 'struct timeval' and jiffies. jiffies is used to avoid discrepancies caused by updates to system time. 'struct timeval' uses 32-bit representation for seconds which will overflow in year 2038. This patch does the following: - Replace the use of 'struct timeval' and jiffies with ktime_t, which is a 64-bit timestamp and is year 2038 safe. - ktime_t provides both long range (like jiffies) and high resolution (like timeval). Using ktime_get (monotonic time) instead of wall-clock time prevents any discprepancies caused by updates to system time. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> --- drivers/block/aoe/aoe.h | 3 +-- drivers/block/aoe/aoecmd.c | 36 +++++++----------------------------- 2 files changed, 8 insertions(+), 31 deletions(-) diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h index 9220f8e..4582b3c 100644 --- a/drivers/block/aoe/aoe.h +++ b/drivers/block/aoe/aoe.h @@ -112,8 +112,7 @@ enum frame_flags { struct frame { struct list_head head; u32 tag; - struct timeval sent; /* high-res time packet was sent */ - u32 sent_jiffs; /* low-res jiffies-based sent time */ + ktime_t sent; ulong waited; ulong waited_total; struct aoetgt *t; /* parent target I belong to */ diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index 422b7d8..7f78780 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -398,8 +398,7 @@ aoecmd_ata_rw(struct aoedev *d) skb = skb_clone(f->skb, GFP_ATOMIC); if (skb) { - do_gettimeofday(&f->sent); - f->sent_jiffs = (u32) jiffies; + f->sent = ktime_get(); __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); aoenet_xmit(&queue); @@ -489,8 +488,7 @@ resend(struct aoedev *d, struct frame *f) skb = skb_clone(skb, GFP_ATOMIC); if (skb == NULL) return; - do_gettimeofday(&f->sent); - f->sent_jiffs = (u32) jiffies; + f->sent = ktime_get(); __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); aoenet_xmit(&queue); @@ -499,32 +497,15 @@ resend(struct aoedev *d, struct frame *f) static int tsince_hr(struct frame *f) { - struct timeval now; + ktime_t now; int n; - do_gettimeofday(&now); - n = now.tv_usec - f->sent.tv_usec; - n += (now.tv_sec - f->sent.tv_sec) * USEC_PER_SEC; + now = ktime_get(); + n = ktime_to_us(ktime_sub(now, f->sent)); if (n < 0) n = -n; - /* For relatively long periods, use jiffies to avoid - * discrepancies caused by updates to the system time. - * - * On system with HZ of 1000, 32-bits is over 49 days - * worth of jiffies, or over 71 minutes worth of usecs. - * - * Jiffies overflow is handled by subtraction of unsigned ints: - * (gdb) print (unsigned) 2 - (unsigned) 0xfffffffe - * $3 = 4 - * (gdb) - */ - if (n > USEC_PER_SEC / 4) { - n = ((u32) jiffies) - f->sent_jiffs; - n *= USEC_PER_SEC / HZ; - } - return n; } @@ -589,7 +570,6 @@ reassign_frame(struct frame *f) nf->waited = 0; nf->waited_total = f->waited_total; nf->sent = f->sent; - nf->sent_jiffs = f->sent_jiffs; f->skb = skb; return nf; @@ -633,8 +613,7 @@ probe(struct aoetgt *t) skb = skb_clone(f->skb, GFP_ATOMIC); if (skb) { - do_gettimeofday(&f->sent); - f->sent_jiffs = (u32) jiffies; + f->sent = ktime_get(); __skb_queue_head_init(&queue); __skb_queue_tail(&queue, skb); aoenet_xmit(&queue); @@ -1474,8 +1453,7 @@ aoecmd_ata_id(struct aoedev *d) skb = skb_clone(skb, GFP_ATOMIC); if (skb) { - do_gettimeofday(&f->sent); - f->sent_jiffs = (u32) jiffies; + f->sent = ktime_get(); } return skb; -- 2.2.0.rc0.207.ga3a616c

9 years, 6 months

[PATCH v3] Staging: media: Replace timeval with ktime_t

by Ksenija Stanojevic

'struct timeval last_tv' is used to get the time of last signal change and 'struct timeval last_intr_tv' is used to get the time of last UART interrupt. 32-bit systems using 'struct timeval' will break in the year 2038, so we have to replace that code with more appropriate types. Here struct timeval is replaced with ktime_t. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic(a)gmail.com> --- Changes in v3: - as John suggested delta function is changed to inline function, checkpatch signals a warning to change min to min_t. Is it a false positive? - change variable names. Changes in v2: - change subject line drivers/staging/media/lirc/lirc_sir.c | 51 +++++++++++++---------------------- 1 file changed, 18 insertions(+), 33 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_sir.c b/drivers/staging/media/lirc/lirc_sir.c index 29087f6..c98c486 100644 --- a/drivers/staging/media/lirc/lirc_sir.c +++ b/drivers/staging/media/lirc/lirc_sir.c @@ -44,7 +44,7 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/serial_reg.h> -#include <linux/time.h> +#include <linux/ktime.h> #include <linux/string.h> #include <linux/types.h> #include <linux/wait.h> @@ -127,9 +127,9 @@ static int threshold = 3; static DEFINE_SPINLOCK(timer_lock); static struct timer_list timerlist; /* time of last signal change detected */ -static struct timeval last_tv = {0, 0}; +static ktime_t last; /* time of last UART data ready interrupt */ -static struct timeval last_intr_tv = {0, 0}; +static ktime_t last_intr_time; static int last_value; static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue); @@ -400,18 +400,11 @@ static void drop_chrdev(void) } /* SECTION: Hardware */ -static long delta(struct timeval *tv1, struct timeval *tv2) +static inline long delta(ktime_t t1, ktime_t t2) { - unsigned long deltv; - - deltv = tv2->tv_sec - tv1->tv_sec; - if (deltv > 15) - deltv = 0xFFFFFF; - else - deltv = deltv*1000000 + - tv2->tv_usec - - tv1->tv_usec; - return deltv; + /* return the delta in 32bit usecs, but cap to UINTMAX in case the + * delta is greater then 32bits */ + return (long) min((unsigned int) ktime_us_delta(t1, t2), UINT_MAX); } static void sir_timeout(unsigned long data) @@ -432,12 +425,12 @@ static void sir_timeout(unsigned long data) /* clear unread bits in UART and restart */ outb(UART_FCR_CLEAR_RCVR, io + UART_FCR); /* determine 'virtual' pulse end: */ - pulse_end = delta(&last_tv, &last_intr_tv); + pulse_end = delta(last, last_intr_time); dev_dbg(driver.dev, "timeout add %d for %lu usec\n", last_value, pulse_end); add_read_queue(last_value, pulse_end); last_value = 0; - last_tv = last_intr_tv; + last = last_intr_time; } spin_unlock_irqrestore(&timer_lock, flags); } @@ -445,7 +438,7 @@ static void sir_timeout(unsigned long data) static irqreturn_t sir_interrupt(int irq, void *dev_id) { unsigned char data; - struct timeval curr_tv; + ktime_t curr_time; static unsigned long deltv; unsigned long deltintrtv; unsigned long flags; @@ -471,9 +464,9 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) do { del_timer(&timerlist); data = inb(io + UART_RX); - do_gettimeofday(&curr_tv); - deltv = delta(&last_tv, &curr_tv); - deltintrtv = delta(&last_intr_tv, &curr_tv); + curr_time = ktime_get(); + deltv = delta(last, curr_time); + deltintrtv = delta(last_intr_time, curr_time); dev_dbg(driver.dev, "t %lu, d %d\n", deltintrtv, (int)data); /* @@ -488,10 +481,7 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) deltv - deltintrtv); last_value = 0; - last_tv.tv_sec = - last_intr_tv.tv_sec; - last_tv.tv_usec = - last_intr_tv.tv_usec; + last = last_intr_time; deltv = deltintrtv; } } @@ -504,16 +494,11 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) add_read_queue(last_value, deltv-TIME_CONST); last_value = data; - last_tv = curr_tv; - if (last_tv.tv_usec >= TIME_CONST) { - last_tv.tv_usec -= TIME_CONST; - } else { - last_tv.tv_sec--; - last_tv.tv_usec += 1000000 - - TIME_CONST; - } + last = curr_time; + last = ktime_sub_us(last, + TIME_CONST); } - last_intr_tv = curr_tv; + last_intr_time = curr_time; if (data) { /* * start timer for end of -- 1.9.1

9 years, 6 months

[PATCH v3 14/22] 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 v3 11/22] posix-timers:Convert to the 64bit methods for the clock_gettime syscall function

by Baolin Wang

This patch introduces the clock_get64 methods with timespec64 type for k_clock structure. Convert to the 64bit methods with timespec64 type for the clock_gettime syscall function, and change the clock_gettime syscall implementation according the the CONFIG_64BIT macro. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 1 + kernel/time/posix-timers.c | 32 ++++++++++++++++++++++++++------ 2 files changed, 27 insertions(+), 6 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 9b6469c..c08a536 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -103,6 +103,7 @@ struct k_clock { int (*clock_set64) (const clockid_t which_clock, const struct timespec64 *tp); int (*clock_get) (const clockid_t which_clock, struct timespec * tp); + int (*clock_get64) (const clockid_t which_clock, struct timespec64 *tp); int (*clock_adj) (const clockid_t which_clock, struct timex *tx); int (*timer_create) (struct k_itimer *timer); int (*nsleep) (const clockid_t which_clock, int flags, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 8aac06d..ccc84d3 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -545,6 +545,16 @@ static int default_clock_set64(const clockid_t which_clock, 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; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -554,8 +564,8 @@ 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; } @@ -571,6 +581,8 @@ void posix_timers_register_clock(const clockid_t clock_id, 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; posix_clocks[clock_id] = *new_clock; } @@ -1115,23 +1127,31 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, #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; -- 1.7.9.5

9 years, 6 months

[PATCH v3 09/22] posix-timers:Convert to the 64bit methods for the clock_settime syscall function

by Baolin Wang

This patch introduces the clock_set64 methods with timespec64 type for k_clock structure. Convert to the 64bit methods with timespec64 type for the clock_settime syscall function, and change the clock_settime syscall implementation according the the CONFIG_64BIT macro. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 28 +++++++++++++++++++++++++--- 2 files changed, 27 insertions(+), 3 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 870ab93..9b6469c 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -100,6 +100,8 @@ struct k_clock { int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); int (*clock_set) (const clockid_t which_clock, const struct timespec *tp); + int (*clock_set64) (const clockid_t which_clock, + const struct timespec64 *tp); int (*clock_get) (const clockid_t which_clock, struct timespec * tp); int (*clock_adj) (const clockid_t which_clock, struct timex *tx); int (*timer_create) (struct k_itimer *timer); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index dcc35fc..0fe8a65 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -535,6 +535,16 @@ static int default_timer_set64(struct k_itimer *timr, int flags, 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; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -559,6 +569,8 @@ void posix_timers_register_clock(const clockid_t clock_id, 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; posix_clocks[clock_id] = *new_clock; } @@ -1072,25 +1084,35 @@ 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 } SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, -- 1.7.9.5

9 years, 6 months

[PATCH v3 05/22] posix-timers:Convert to the 64bit methods for the timer_gettime syscall function

by Baolin Wang

Convert to the 64bit methods with timespec64/itimerspec64 type for the timer_gettime syscall function, and change the timer_gettime syscall implementation according to the CONFIG_64BIT macro. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 31 +++++++++++++++++++++++++++---- 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 907f3fd..e84436b 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -113,6 +113,8 @@ struct k_clock { #define TIMER_RETRY 1 void (*timer_get) (struct k_itimer * timr, struct itimerspec * cur_setting); + void (*timer_get64) (struct k_itimer *timr, + struct itimerspec64 *cur_setting); }; extern struct k_clock clock_posix_cpu; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 9df664a..f7cf00b 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 +514,16 @@ 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; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -533,6 +544,9 @@ void posix_timers_register_clock(const clockid_t clock_id, return; } + if (new_clock->timer_get && !new_clock->timer_get64) + new_clock->timer_get64 = default_timer_get64; + posix_clocks[clock_id] = *new_clock; } EXPORT_SYMBOL_GPL(posix_timers_register_clock); @@ -766,7 +780,7 @@ 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 +792,10 @@ 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 +805,17 @@ 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; -- 1.7.9.5

9 years, 6 months

[PATCH v3 06/23] posix-timers:Convert to the 64bit methods for the timer_gettime syscall function

by Baolin Wang

This patch introduces the timer_get64 method with itimerspec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with itimerspec64 type for the timer_gettime syscall function, and change the timer_gettime syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the timer_get64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 31 +++++++++++++++++++++++++++---- 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 907f3fd..e84436b 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -113,6 +113,8 @@ struct k_clock { #define TIMER_RETRY 1 void (*timer_get) (struct k_itimer * timr, struct itimerspec * cur_setting); + void (*timer_get64) (struct k_itimer *timr, + struct itimerspec64 *cur_setting); }; extern struct k_clock clock_posix_cpu; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 9df664a..91036b1 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 +514,16 @@ static struct pid *good_sigevent(sigevent_t * event) return task_pid(rtn); } +static void 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); + *cur_setting64 = itimerspec_to_itimerspec64(&cur_setting); +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -533,6 +544,9 @@ void posix_timers_register_clock(const clockid_t clock_id, return; } + if (new_clock->timer_get && !new_clock->timer_get64) + new_clock->timer_get64 = default_timer_get64; + posix_clocks[clock_id] = *new_clock; } EXPORT_SYMBOL_GPL(posix_timers_register_clock); @@ -766,7 +780,7 @@ 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 +792,10 @@ 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 +805,17 @@ 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; -- 1.7.9.5

9 years, 6 months

[PATCH v3 08/23] posix-timers:Convert to the 64bit methods for the timer_settime syscall function

by Baolin Wang

This patch introduces the timer_set64 method with itimerspec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with itimerspec64 type for the timer_settime syscall function, and change the timer_settime syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the timer_set64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 3 +++ kernel/time/posix-timers.c | 46 +++++++++++++++++++++++++++++++++++++----- 2 files changed, 44 insertions(+), 5 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index e84436b..16c3364 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -109,6 +109,9 @@ struct k_clock { int (*timer_set) (struct k_itimer * timr, int flags, struct itimerspec * new_setting, struct itimerspec * old_setting); + int (*timer_set64) (struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting); int (*timer_del) (struct k_itimer * timr); #define TIMER_RETRY 1 void (*timer_get) (struct k_itimer * timr, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index d289846..e7b98f9 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -524,6 +524,23 @@ static void default_timer_get64(struct k_itimer *timr, *cur_setting64 = itimerspec_to_itimerspec64(&cur_setting); } +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; + int ret; + + new_setting = itimerspec64_to_itimerspec(new_setting64); + old_setting = itimerspec64_to_itimerspec(old_setting64); + ret = kc->timer_set(timr, flags, &new_setting, &old_setting); + if (!ret && old_setting64) + *old_setting64 = itimerspec_to_itimerspec64(&old_setting); + + return ret; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -546,6 +563,8 @@ void posix_timers_register_clock(const clockid_t clock_id, 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; posix_clocks[clock_id] = *new_clock; } @@ -899,8 +918,8 @@ 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; @@ -913,10 +932,10 @@ 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) { @@ -932,9 +951,16 @@ 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; @@ -946,7 +972,17 @@ 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))) -- 1.7.9.5

9 years, 6 months

[PATCH v3 00/22] 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 v2: -Split the syscall conversion patch into small some patches. Baolin Wang (22): 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:Split out the guts of the syscall and change the implementation for timer_gettime posix-timers:Convert to the 64bit methods for the timer_gettime syscall function posix-timers:Split out the guts of the syscall and change the implementation for timer_settime posix-timers:Convert to the 64bit methods for the timer_settime syscall function posix-timers:Split out the guts of the syscall and change the implementation for clock_settime posix-timers:Convert to the 64bit methods for the clock_settime syscall function posix-timers:Split out the guts of the syscall and change the implementation for clock_gettime posix-timers:Convert to the 64bit methods for the clock_gettime syscall function posix-timers:Split out the guts of the syscall and change the implementation for clock_getres posix-timers:Convert to the 64bit methods for the clock_getres 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 64bit 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

[PATCH v3 14/23] posix-timers:Convert to the 64bit methods for the clock_getres syscall function

by Baolin Wang

This patch introduces the clock_getres64 method with timespec64 type for k_clock structure, that makes it ready for the 2038 year. Convert to the 64bit method with timespec64 type for the clock_getres syscall function, and change the clock_getres syscall implementation according to the CONFIG_64BIT macro. Also add a default 64bit method for the clock_getres64 pointer of k_clock structure, and it will be removed after all the drivers are converted to 64bit methods. Signed-off-by: Baolin Wang <baolin.wang(a)linaro.org> --- include/linux/posix-timers.h | 1 + kernel/time/posix-timers.c | 38 ++++++++++++++++++++++++++++++++------ 2 files changed, 33 insertions(+), 6 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index be2123d..35786c5 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -98,6 +98,7 @@ struct k_itimer { struct k_clock { int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); + int (*clock_getres64) (const clockid_t which_clock, struct timespec64 *tp); int (*clock_set) (const clockid_t which_clock, const struct timespec *tp); int (*clock_set64) (const clockid_t which_clock, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a9e14cf..e0a6a09 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -567,6 +567,20 @@ static int default_clock_get64(const clockid_t which_clock, return ret; } +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; + int ret; + + ret = kc->clock_getres(which_clock, &tp); + if (!ret) + *tp64 = timespec_to_timespec64(tp); + + return 0; +} + void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock) { @@ -581,8 +595,8 @@ void posix_timers_register_clock(const clockid_t clock_id, 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; } @@ -595,6 +609,8 @@ void posix_timers_register_clock(const clockid_t clock_id, 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; } @@ -642,7 +658,8 @@ 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]; } @@ -1195,23 +1212,32 @@ 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

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