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 #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 #ifndef CONFIG_NETPRIO_CGROUP 34 extern int net_prio_subsys_id; 35 #endif 36 37 extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task); 38 39 #if IS_BUILTIN(CONFIG_NETPRIO_CGROUP) 40 41 static inline u32 task_netprioidx(struct task_struct *p) 42 { 43 struct cgroup_netprio_state *state; 44 u32 idx; 45 46 rcu_read_lock(); 47 state = container_of(task_subsys_state(p, net_prio_subsys_id), 48 struct cgroup_netprio_state, css); 49 idx = state->prioidx; 50 rcu_read_unlock(); 51 return idx; 52 } 53 54 #elif IS_MODULE(CONFIG_NETPRIO_CGROUP) 55 56 static inline u32 task_netprioidx(struct task_struct *p) 57 { 58 struct cgroup_netprio_state *state; 59 int subsys_id; 60 u32 idx = 0; 61 62 rcu_read_lock(); 63 subsys_id = rcu_dereference_index_check(net_prio_subsys_id, 64 rcu_read_lock_held()); 65 if (subsys_id >= 0) { 66 state = container_of(task_subsys_state(p, subsys_id), 67 struct cgroup_netprio_state, css); 68 idx = state->prioidx; 69 } 70 rcu_read_unlock(); 71 return idx; 72 } 73 #endif 74 75 #else /* !CONFIG_NETPRIO_CGROUP */ 76 77 static inline u32 task_netprioidx(struct task_struct *p) 78 { 79 return 0; 80 } 81 82 #define sock_update_netprioidx(sk, task) 83 84 #endif /* CONFIG_NETPRIO_CGROUP */ 85 86 #endif /* _NET_CLS_CGROUP_H */ 87