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Kernel: Make all syscall functions return KResultOr<T>

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This makes it a lot easier to return errors since we no longer have to
worry about negating EFOO errors and can just return them flat.
This commit is contained in:
Andreas Kling 2021-03-01 13:49:16 +01:00
parent 9af1e1a3bf
commit ac71775de5
70 changed files with 747 additions and 742 deletions
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26
Kernel/Syscalls/sched.cpp
View file

@ -28,36 +28,36 @@
namespace Kernel {
int Process::sys$yield()
KResultOr<int> Process::sys$yield()
{
REQUIRE_PROMISE(stdio);
Thread::current()->yield_without_holding_big_lock();
return 0;
}
int Process::sys$donate(pid_t tid)
KResultOr<int> Process::sys$donate(pid_t tid)
{
REQUIRE_PROMISE(stdio);
if (tid < 0)
return -EINVAL;
return EINVAL;
ScopedCritical critical;
auto thread = Thread::from_tid(tid);
if (!thread || thread->pid() != pid())
return -ESRCH;
return ESRCH;
Thread::current()->donate_without_holding_big_lock(thread, "sys$donate");
return 0;
}
int Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> user_param)
KResultOr<int> Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> user_param)
{
REQUIRE_PROMISE(proc);
struct sched_param desired_param;
if (!copy_from_user(&desired_param, user_param))
return -EFAULT;
return EFAULT;
if (desired_param.sched_priority < THREAD_PRIORITY_MIN || desired_param.sched_priority > THREAD_PRIORITY_MAX)
return -EINVAL;
return EINVAL;
auto* peer = Thread::current();
ScopedSpinLock lock(g_scheduler_lock);
@ -65,16 +65,16 @@ int Process::sys$sched_setparam(int pid, Userspace<const struct sched_param*> us
peer = Thread::from_tid(pid);
if (!peer)
return -ESRCH;
return ESRCH;
if (!is_superuser() && m_euid != peer->process().m_uid && m_uid != peer->process().m_uid)
return -EPERM;
return EPERM;
peer->set_priority((u32)desired_param.sched_priority);
return 0;
}
int Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_param)
KResultOr<int> Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_param)
{
REQUIRE_PROMISE(proc);
int priority;
@ -88,10 +88,10 @@ int Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_p
}
if (!peer)
return -ESRCH;
return ESRCH;
if (!is_superuser() && m_euid != peer->process().m_uid && m_uid != peer->process().m_uid)
return -EPERM;
return EPERM;
priority = (int)peer->priority();
}
@ -100,7 +100,7 @@ int Process::sys$sched_getparam(pid_t pid, Userspace<struct sched_param*> user_p
priority
};
if (!copy_to_user(user_param, &param))
return -EFAULT;
return EFAULT;
return 0;
}