SYSCALL_DEFINE3(fairsched_nodemask, unsigned int, id, unsigned int, len,
unsigned long __user *, user_mask_ptr)
{
struct cgroup *cgrp;
char name[16];
int retval;
nodemask_t new_mask, in_mask;
if (!capable_setveid())
return -EPERM;
if (id == 0)
return -EINVAL;
fairsched_name(name, sizeof(name), id);
cgrp = cgroup_kernel_open(fairsched_root, 0, name);
if (IS_ERR(cgrp))
return PTR_ERR(cgrp);
if (cgrp == NULL)
return -ENOENT;
retval = get_user_node_mask(user_mask_ptr, len, &in_mask);
if (retval == 0) {
nodes_and(new_mask, in_mask, node_states[N_HIGH_MEMORY]);
cgroup_lock();
retval = cgroup_set_nodemask(cgrp, &new_mask);
cgroup_unlock();
}
cgroup_kernel_close(cgrp);
return retval;
}
static u64 taskcount_read(struct cgroup *cont, struct cftype *cft)
{
u64 conut;
cgroup_lock();
count = cgroup_task_count(cont);
cgroup_unlock();
return count;
}
SYSCALL_DEFINE3(fairsched_cpumask, unsigned int, id, unsigned int, len,
unsigned long __user *, user_mask_ptr)
{
struct cgroup *cgrp;
int retval;
cpumask_var_t new_mask, in_mask;
if (!capable_setveid())
return -EPERM;
if (id == 0)
return -EINVAL;
cgrp = fairsched_open(id);
if (IS_ERR(cgrp))
return PTR_ERR(cgrp);
if (!alloc_cpumask_var(&in_mask, GFP_KERNEL)) {
retval = -ENOMEM;
goto out;
}
if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) {
retval = -ENOMEM;
goto out_free_in_mask;
}
retval = get_user_cpu_mask(user_mask_ptr, len, in_mask);
if (retval == 0) {
cpumask_and(new_mask, in_mask, cpu_active_mask);
cgroup_lock();
retval = cgroup_set_cpumask(cgrp, new_mask);
cgroup_unlock();
}
free_cpumask_var(new_mask);
out_free_in_mask:
free_cpumask_var(in_mask);
out:
cgroup_kernel_close(cgrp);
return retval;
}
