#ifndef _TCP_MEMCG_H
  #define _TCP_MEMCG_H
  
  struct tcp_memcontrol {
  	struct cg_proto cg_proto;
  	/* per-cgroup tcp memory pressure knobs */
  	struct res_counter tcp_memory_allocated;
  	struct percpu_counter tcp_sockets_allocated;
  	/* those two are read-mostly, leave them at the end */
  	long tcp_prot_mem[3];
  	int tcp_memory_pressure;
  };
  
  struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg);
  int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss);
  void tcp_destroy_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss);

  unsigned long long tcp_max_memory(const struct mem_cgroup *memcg);
  void tcp_prot_mem(struct mem_cgroup *memcg, long val, int idx);

  #endif /* _TCP_MEMCG_H */