int
ksched_setparam(struct ksched *ksched,
struct thread *td, const struct sched_param *param)
{
int policy;
int e;
e = getscheduler(ksched, td, &policy);
if (e == 0)
{
e = ksched_setscheduler(ksched, td, policy, param);
}
return e;
}
int ksched_setparam(register_t *ret, struct ksched *ksched,
struct proc *p, const struct sched_param *param)
{
register_t policy;
int e;
e = getscheduler(&policy, ksched, p);
if (e == 0)
{
if (policy == SCHED_OTHER)
e = EINVAL;
else
e = ksched_setscheduler(ret, ksched, p, policy, param);
}
return e;
}
int
sys_sched_setscheduler(struct thread *td, struct sched_setscheduler_args *uap)
{
int e;
struct sched_param sched_param;
struct thread *targettd;
struct proc *targetp;
/* Don't allow non root user to set a scheduler policy. */
e = priv_check(td, PRIV_SCHED_SET);
if (e)
return (e);
e = copyin(uap->param, &sched_param, sizeof(sched_param));
if (e)
return (e);
if (uap->pid == 0) {
targetp = td->td_proc;
targettd = td;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL)
return (ESRCH);
targettd = FIRST_THREAD_IN_PROC(targetp);
}
e = p_cansched(td, targetp);
if (e == 0) {
e = ksched_setscheduler(ksched, targettd,
uap->policy, (const struct sched_param *)&sched_param);
}
PROC_UNLOCK(targetp);
return (e);
}
