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netprio_cgroup.h
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1 /*
2  * netprio_cgroup.h Control Group Priority set
3  *
4  *
5  * Authors: Neil Horman <[email protected]>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  */
13 
14 #ifndef _NETPRIO_CGROUP_H
15 #define _NETPRIO_CGROUP_H
16 #include <linux/cgroup.h>
17 #include <linux/hardirq.h>
18 #include <linux/rcupdate.h>
19 
20 
21 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
22 struct netprio_map {
23  struct rcu_head rcu;
24  u32 priomap_len;
25  u32 priomap[];
26 };
27 
28 struct cgroup_netprio_state {
29  struct cgroup_subsys_state css;
30  u32 prioidx;
31 };
32 
33 extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
34 
35 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
36 
37 static inline u32 task_netprioidx(struct task_struct *p)
38 {
39  struct cgroup_netprio_state *state;
40  u32 idx;
41 
42  rcu_read_lock();
43  state = container_of(task_subsys_state(p, net_prio_subsys_id),
44  struct cgroup_netprio_state, css);
45  idx = state->prioidx;
46  rcu_read_unlock();
47  return idx;
48 }
49 
50 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
51 
52 static inline u32 task_netprioidx(struct task_struct *p)
53 {
54  struct cgroup_subsys_state *css;
55  u32 idx = 0;
56 
57  rcu_read_lock();
58  css = task_subsys_state(p, net_prio_subsys_id);
59  if (css)
60  idx = container_of(css,
61  struct cgroup_netprio_state, css)->prioidx;
62  rcu_read_unlock();
63  return idx;
64 }
65 #endif
66 
67 #else /* !CONFIG_NETPRIO_CGROUP */
68 
69 static inline u32 task_netprioidx(struct task_struct *p)
70 {
71  return 0;
72 }
73 
74 #define sock_update_netprioidx(sk, task)
75 
76 #endif /* CONFIG_NETPRIO_CGROUP */
77 
78 #endif /* _NET_CLS_CGROUP_H */