75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
|
#include <net/tcp.h>
|
||
|
|
#include <net/tcp_memcontrol.h>
|
||
|
|
#include <net/sock.h>
|
||
|
|
#include <linux/memcontrol.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
static inline struct tcp_memcontrol *tcp_from_cgproto(struct cg_proto *cg_proto)
|
||
|
|
{
|
||
|
|
return container_of(cg_proto, struct tcp_memcontrol, cg_proto);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void memcg_tcp_enter_memory_pressure(struct sock *sk)
|
||
|
|
{
|
||
|
|
if (!sk->sk_cgrp->memory_pressure)
|
||
|
|
*sk->sk_cgrp->memory_pressure = 1;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(memcg_tcp_enter_memory_pressure);
|
||
|
|
|
||
|
|
int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* The root cgroup does not use res_counters, but rather,
|
||
|
|
* rely on the data already collected by the network
|
||
|
|
* subsystem
|
||
|
|
*/
|
||
|
|
struct res_counter *res_parent = NULL;
|
||
|
|
struct cg_proto *cg_proto, *parent_cg;
|
||
|
|
struct tcp_memcontrol *tcp;
|
||
|
|
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
|
||
|
|
struct mem_cgroup *parent = parent_mem_cgroup(memcg);
|
||
|
|
|
||
|
|
cg_proto = tcp_prot.proto_cgroup(memcg);
|
||
|
|
if (!cg_proto)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
tcp = tcp_from_cgproto(cg_proto);
|
||
|
|
|
||
|
|
tcp->tcp_prot_mem[0] = sysctl_tcp_mem[0];
|
||
|
|
tcp->tcp_prot_mem[1] = sysctl_tcp_mem[1];
|
||
|
|
tcp->tcp_prot_mem[2] = sysctl_tcp_mem[2];
|
||
|
|
tcp->tcp_memory_pressure = 0;
|
||
|
|
|
||
|
|
parent_cg = tcp_prot.proto_cgroup(parent);
|
||
|
|
if (parent_cg)
|
||
|
|
res_parent = parent_cg->memory_allocated;
|
||
|
|
|
||
|
|
res_counter_init(&tcp->tcp_memory_allocated, res_parent);
|
||
|
|
percpu_counter_init(&tcp->tcp_sockets_allocated, 0);
|
||
|
|
|
||
|
|
cg_proto->enter_memory_pressure = memcg_tcp_enter_memory_pressure;
|
||
|
|
cg_proto->memory_pressure = &tcp->tcp_memory_pressure;
|
||
|
|
cg_proto->sysctl_mem = tcp->tcp_prot_mem;
|
||
|
|
cg_proto->memory_allocated = &tcp->tcp_memory_allocated;
|
||
|
|
cg_proto->sockets_allocated = &tcp->tcp_sockets_allocated;
|
||
|
|
cg_proto->memcg = memcg;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(tcp_init_cgroup);
|
||
|
|
|
||
|
|
void tcp_destroy_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
|
||
|
|
{
|
||
|
|
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
|
||
|
|
struct cg_proto *cg_proto;
|
||
|
|
struct tcp_memcontrol *tcp;
|
||
|
|
|
||
|
|
cg_proto = tcp_prot.proto_cgroup(memcg);
|
||
|
|
if (!cg_proto)
|
||
|
|
return;
|
||
|
|
|
||
|
|
tcp = tcp_from_cgproto(cg_proto);
|
||
|
|
percpu_counter_destroy(&tcp->tcp_sockets_allocated);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(tcp_destroy_cgroup);
|