kconfig: update compression algorithm info
[cascardo/linux.git] / include / net / netprio_cgroup.h
1 /*
2  * netprio_cgroup.h                     Control Group Priority set
3  *
4  *
5  * Authors:     Neil Horman <nhorman@tuxdriver.com>
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 struct netprio_map {
22         struct rcu_head rcu;
23         u32 priomap_len;
24         u32 priomap[];
25 };
26
27 #ifdef CONFIG_CGROUPS
28
29 struct cgroup_netprio_state {
30         struct cgroup_subsys_state css;
31         u32 prioidx;
32 };
33
34 #ifndef CONFIG_NETPRIO_CGROUP
35 extern int net_prio_subsys_id;
36 #endif
37
38 extern void sock_update_netprioidx(struct sock *sk);
39
40 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
41
42 static inline u32 task_netprioidx(struct task_struct *p)
43 {
44         struct cgroup_netprio_state *state;
45         u32 idx;
46
47         rcu_read_lock();
48         state = container_of(task_subsys_state(p, net_prio_subsys_id),
49                              struct cgroup_netprio_state, css);
50         idx = state->prioidx;
51         rcu_read_unlock();
52         return idx;
53 }
54
55 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
56
57 static inline u32 task_netprioidx(struct task_struct *p)
58 {
59         struct cgroup_netprio_state *state;
60         int subsys_id;
61         u32 idx = 0;
62
63         rcu_read_lock();
64         subsys_id = rcu_dereference_index_check(net_prio_subsys_id,
65                                                 rcu_read_lock_held());
66         if (subsys_id >= 0) {
67                 state = container_of(task_subsys_state(p, subsys_id),
68                                      struct cgroup_netprio_state, css);
69                 idx = state->prioidx;
70         }
71         rcu_read_unlock();
72         return idx;
73 }
74
75 #else
76
77 static inline u32 task_netprioidx(struct task_struct *p)
78 {
79         return 0;
80 }
81
82 #endif /* CONFIG_NETPRIO_CGROUP */
83
84 #else
85 #define sock_update_netprioidx(sk)
86 #endif
87
88 #endif  /* _NET_CLS_CGROUP_H */