Usage of these apis and their compat versions makes the syscalls: clock_nanosleep and nanosleep and their compat implementations simpler.
This is a preparatory patch to isolate data conversions to struct timespec64 at userspace boundaries. This helps contain the changes needed to transition to new y2038 safe types. Signed-off-by: Deepa Dinamani <[email protected]> --- include/linux/hrtimer.h | 2 +- kernel/time/alarmtimer.c | 4 ++-- kernel/time/hrtimer.c | 30 +++++++++++++----------------- kernel/time/posix-cpu-timers.c | 8 ++------ kernel/time/posix-timers.c | 20 ++++++++------------ 5 files changed, 26 insertions(+), 38 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 255edd5e7a74..012c37fdb688 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -453,7 +453,7 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer, /* Precise sleep: */ -extern int nanosleep_copyout(struct restart_block *, struct timespec *); +extern int nanosleep_copyout(struct restart_block *, struct timespec64 *); extern long hrtimer_nanosleep(const struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index c991cf212c6d..0b8ff7d257ea 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -712,14 +712,14 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, alarmtimer_freezerset(absexp, type); restart = ¤t->restart_block; if (restart->nanosleep.type != TT_NONE) { - struct timespec rmt; + struct timespec64 rmt; ktime_t rem; rem = ktime_sub(absexp, alarm_bases[type].gettime()); if (rem <= 0) return 0; - rmt = ktime_to_timespec(rem); + rmt = ktime_to_timespec64(rem); return nanosleep_copyout(restart, &rmt); } diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 81da124f1115..88f75f92ef36 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1440,17 +1440,17 @@ void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task) } EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); -int nanosleep_copyout(struct restart_block *restart, struct timespec *ts) +int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts) { switch(restart->nanosleep.type) { #ifdef CONFIG_COMPAT case TT_COMPAT: - if (compat_put_timespec(ts, restart->nanosleep.compat_rmtp)) + if (compat_put_timespec64(ts, restart->nanosleep.compat_rmtp)) return -EFAULT; break; #endif case TT_NATIVE: - if (copy_to_user(restart->nanosleep.rmtp, ts, sizeof(struct timespec))) + if (put_timespec64(ts, restart->nanosleep.rmtp)) return -EFAULT; break; default: @@ -1485,11 +1485,11 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod restart = ¤t->restart_block; if (restart->nanosleep.type != TT_NONE) { ktime_t rem = hrtimer_expires_remaining(&t->timer); - struct timespec rmt; + struct timespec64 rmt; if (rem <= 0) return 0; - rmt = ktime_to_timespec(rem); + rmt = ktime_to_timespec64(rem); return nanosleep_copyout(restart, &rmt); } @@ -1546,19 +1546,17 @@ long hrtimer_nanosleep(const struct timespec64 *rqtp, SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, struct timespec __user *, rmtp) { - struct timespec64 tu64; - struct timespec tu; + struct timespec64 tu; - if (copy_from_user(&tu, rqtp, sizeof(tu))) + if (get_timespec64(&tu, rqtp)) return -EFAULT; - tu64 = timespec_to_timespec64(tu); - if (!timespec64_valid(&tu64)) + if (!timespec64_valid(&tu)) return -EINVAL; current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; - return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } #ifdef CONFIG_COMPAT @@ -1566,19 +1564,17 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp, struct compat_timespec __user *, rmtp) { - struct timespec64 tu64; - struct timespec tu; + struct timespec64 tu; - if (compat_get_timespec(&tu, rqtp)) + if (compat_get_timespec64(&tu, rqtp)) return -EFAULT; - tu64 = timespec_to_timespec64(tu); - if (!timespec64_valid(&tu64)) + if (!timespec64_valid(&tu)) return -EINVAL; current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; current->restart_block.nanosleep.compat_rmtp = rmtp; - return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } #endif diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 60cb24ac9ebc..a3bd5dbe0dc4 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1318,12 +1318,8 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, */ restart = ¤t->restart_block; restart->nanosleep.expires = expires; - if (restart->nanosleep.type != TT_NONE) { - struct timespec ts; - - ts = timespec64_to_timespec(it.it_value); - error = nanosleep_copyout(restart, &ts); - } + if (restart->nanosleep.type != TT_NONE) + error = nanosleep_copyout(restart, &it.it_value); } return error; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 8717f4bc7182..6818818caffd 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1207,26 +1207,24 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, struct timespec __user *, rmtp) { const struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec64 t64; - struct timespec t; + struct timespec64 t; if (!kc) return -EINVAL; if (!kc->nsleep) return -ENANOSLEEP_NOTSUP; - if (copy_from_user(&t, rqtp, sizeof (struct timespec))) + if (get_timespec64(&t, rqtp)) return -EFAULT; - t64 = timespec_to_timespec64(t); - if (!timespec64_valid(&t64)) + if (!timespec64_valid(&t)) return -EINVAL; if (flags & TIMER_ABSTIME) rmtp = NULL; current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; - return kc->nsleep(which_clock, flags, &t64); + return kc->nsleep(which_clock, flags, &t); } #ifdef CONFIG_COMPAT @@ -1235,26 +1233,24 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, struct compat_timespec __user *, rmtp) { const struct k_clock *kc = clockid_to_kclock(which_clock); - struct timespec64 t64; - struct timespec t; + struct timespec64 t; if (!kc) return -EINVAL; if (!kc->nsleep) return -ENANOSLEEP_NOTSUP; - if (compat_get_timespec(&t, rqtp)) + if (compat_get_timespec64(&t, rqtp)) return -EFAULT; - t64 = timespec_to_timespec64(t); - if (!timespec64_valid(&t64)) + if (!timespec64_valid(&t)) return -EINVAL; if (flags & TIMER_ABSTIME) rmtp = NULL; current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; current->restart_block.nanosleep.compat_rmtp = rmtp; - return kc->nsleep(which_clock, flags, &t64); + return kc->nsleep(which_clock, flags, &t); } #endif -- 2.11.0
