#ifndef _NETPRIO_CGROUP_H
#define _NETPRIO_CGROUP_H
-#include <linux/module.h>
#include <linux/cgroup.h>
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
extern void sock_update_netprioidx(struct sock *sk);
-static inline struct cgroup_netprio_state
- *task_netprio_state(struct task_struct *p)
+#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
+
+static inline u32 task_netprioidx(struct task_struct *p)
{
-#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
- return container_of(task_subsys_state(p, net_prio_subsys_id),
- struct cgroup_netprio_state, css);
-#else
- return NULL;
-#endif
+ struct cgroup_netprio_state *state;
+ u32 idx;
+
+ rcu_read_lock();
+ state = container_of(task_subsys_state(p, net_prio_subsys_id),
+ struct cgroup_netprio_state, css);
+ idx = state->prioidx;
+ rcu_read_unlock();
+ return idx;
+}
+
+#elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
+
+static inline u32 task_netprioidx(struct task_struct *p)
+{
+ struct cgroup_netprio_state *state;
+ int subsys_id;
+ u32 idx = 0;
+
+ rcu_read_lock();
+ subsys_id = rcu_dereference_index_check(net_prio_subsys_id,
+ rcu_read_lock_held());
+ if (subsys_id >= 0) {
+ state = container_of(task_subsys_state(p, subsys_id),
+ struct cgroup_netprio_state, css);
+ idx = state->prioidx;
+ }
+ rcu_read_unlock();
+ return idx;
}
#else
+static inline u32 task_netprioidx(struct task_struct *p)
+{
+ return 0;
+}
+
+#endif /* CONFIG_NETPRIO_CGROUP */
+
+#else
#define sock_update_netprioidx(sk)
#endif