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Kernel: Make copy_{from,to}_user() return KResult and use TRY()

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This makes EFAULT propagation flow much more naturally. :^)
This commit is contained in:
Andreas Kling 2021-09-05 17:38:37 +02:00
parent 9903f5c6ef
commit 48a0b31c47
57 changed files with 318 additions and 551 deletions
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16
Kernel/Syscalls/clock.cpp
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@ -37,10 +37,7 @@ KResultOr<FlatPtr> Process::sys$clock_gettime(clockid_t clock_id, Userspace<time
return EINVAL;
auto ts = TimeManagement::the().current_time(clock_id).to_timespec();
if (!copy_to_user(user_ts, &ts))
return EFAULT;
return 0;
return copy_to_user(user_ts, &ts);
}
KResultOr<FlatPtr> Process::sys$clock_settime(clockid_t clock_id, Userspace<const timespec*> user_ts)
@ -71,8 +68,7 @@ KResultOr<FlatPtr> Process::sys$clock_nanosleep(Userspace<const Syscall::SC_cloc
REQUIRE_PROMISE(stdio);
Syscall::SC_clock_nanosleep_params params;
if (!copy_from_user(&params, user_params))
return EFAULT;
TRY(copy_from_user(&params, user_params));
Optional<Time> requested_sleep = copy_time_from_user(params.requested_sleep);
if (!requested_sleep.has_value())
@ -100,8 +96,9 @@ KResultOr<FlatPtr> Process::sys$clock_nanosleep(Userspace<const Syscall::SC_cloc
Time remaining_sleep;
was_interrupted = Thread::current()->sleep(params.clock_id, requested_sleep.value(), &remaining_sleep).was_interrupted();
timespec remaining_sleep_ts = remaining_sleep.to_timespec();
if (was_interrupted && params.remaining_sleep && !copy_to_user(params.remaining_sleep, &remaining_sleep_ts))
return EFAULT;
if (was_interrupted && params.remaining_sleep) {
TRY(copy_to_user(params.remaining_sleep, &remaining_sleep_ts));
}
}
if (was_interrupted)
return EINTR;
@ -115,8 +112,7 @@ KResultOr<FlatPtr> Process::sys$adjtime(Userspace<const timeval*> user_delta, Us
timespec old_delta_ts = TimeManagement::the().remaining_epoch_time_adjustment();
timeval old_delta;
timespec_to_timeval(old_delta_ts, old_delta);
if (!copy_to_user(user_old_delta, &old_delta))
return EFAULT;
TRY(copy_to_user(user_old_delta, &old_delta));
}
if (user_delta) {