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| author |   Deepa Dinamani <deepa.kernel@gmail.com> | 2017-06-24 11:45:06 -0700 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2017-06-30 04:14:14 -0400 |
| commit | c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0 (patch) | |
| tree | 9c670f99b106a03963fa9a2bc606617cd0958497 /kernel/time/posix-timers.c | |
| parent | posix-timers: Use get_timespec64() and put_timespec64() (diff) | |
| download | linux-dev-c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0.tar.xz linux-dev-c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0.zip | |
nanosleep: Use get_timespec64() and put_timespec64()
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 <deepa.kernel@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/time/posix-timers.c')
| -rw-r--r-- | kernel/time/posix-timers.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 39322ae5dd87..4b0fc3b0a1c4 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1213,26 +1213,24 @@ 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 @@ -1241,26 +1239,24 @@ 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 |