diff options
| author | Andrei Vagin | 2019-11-12 01:27:06 +0000 |
|---|---|---|
| committer | Thomas Gleixner | 2020-01-14 12:20:55 +0100 |
| commit | 1f9b37bfbb607a09d838c248843e63a2cafe1080 (patch) | |
| tree | 0dbc98e58b431bc35b5a4960d38b2174ff2106ec /kernel/time | |
| parent | ea2d1f7fce0f18b67f915c00c6a7a6860116bc92 (diff) | |
posix-timers: Make clock_nanosleep() time namespace aware
clock_nanosleep() accepts absolute values of expiration time, if the
TIMER_ABSTIME flag is set. This value is in the tasks time namespace,
which has to be converted to the host time namespace.
Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-18-dima@arista.com
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/posix-stubs.c | 12 | ||||
| -rw-r--r-- | kernel/time/posix-timers.c | 17 |
2 files changed, 25 insertions, 4 deletions
diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 5745a138f254..fcb3b21d8bdc 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -129,6 +129,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, struct __kernel_timespec __user *, rmtp) { struct timespec64 t; + ktime_t texp; switch (which_clock) { case CLOCK_REALTIME: @@ -147,7 +148,10 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, rmtp = NULL; current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; - return hrtimer_nanosleep(timespec64_to_ktime(t), flags & TIMER_ABSTIME ? + texp = timespec64_to_ktime(t); + if (flags & TIMER_ABSTIME) + texp = timens_ktime_to_host(which_clock, texp); + return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); } @@ -218,6 +222,7 @@ SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags, struct old_timespec32 __user *, rmtp) { struct timespec64 t; + ktime_t texp; switch (which_clock) { case CLOCK_REALTIME: @@ -236,7 +241,10 @@ SYSCALL_DEFINE4(clock_nanosleep_time32, clockid_t, which_clock, int, flags, rmtp = NULL; current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; current->restart_block.nanosleep.compat_rmtp = rmtp; - return hrtimer_nanosleep(timespec64_to_ktime(t), flags & TIMER_ABSTIME ? + texp = timespec64_to_ktime(t); + if (flags & TIMER_ABSTIME) + texp = timens_ktime_to_host(which_clock, texp); + return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); } diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 75fee6e39e5a..ff0eb30de346 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1228,6 +1228,19 @@ static int common_nsleep(const clockid_t which_clock, int flags, which_clock); } +static int common_nsleep_timens(const clockid_t which_clock, int flags, + const struct timespec64 *rqtp) +{ + ktime_t texp = timespec64_to_ktime(*rqtp); + + if (flags & TIMER_ABSTIME) + texp = timens_ktime_to_host(which_clock, texp); + + return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ? + HRTIMER_MODE_ABS : HRTIMER_MODE_REL, + which_clock); +} + SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, const struct __kernel_timespec __user *, rqtp, struct __kernel_timespec __user *, rmtp) @@ -1305,7 +1318,7 @@ static const struct k_clock clock_monotonic = { .clock_getres = posix_get_hrtimer_res, .clock_get_timespec = posix_get_monotonic_timespec, .clock_get_ktime = posix_get_monotonic_ktime, - .nsleep = common_nsleep, + .nsleep = common_nsleep_timens, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, @@ -1354,7 +1367,7 @@ static const struct k_clock clock_boottime = { .clock_getres = posix_get_hrtimer_res, .clock_get_ktime = posix_get_boottime_ktime, .clock_get_timespec = posix_get_boottime_timespec, - .nsleep = common_nsleep, + .nsleep = common_nsleep_timens, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, |