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authorEric W. Biederman <ebiederm@xmission.com>2013-10-19 16:26:19 -0700
committerDavid S. Miller <davem@davemloft.net>2013-10-21 18:43:02 -0400
commit2e685cad57906e19add7189b5ff49dfb6aaa21d3 (patch)
treed8e382e4e7e0a684284542b6aab8187e18b10a91 /net/ipv4
parenttcp_memcontrol: Remove the per netns control. (diff)
downloadlinux-dev-2e685cad57906e19add7189b5ff49dfb6aaa21d3.tar.xz
linux-dev-2e685cad57906e19add7189b5ff49dfb6aaa21d3.zip
tcp_memcontrol: Kill struct tcp_memcontrol
Replace the pointers in struct cg_proto with actual data fields and kill struct tcp_memcontrol as it is not fully redundant. This removes a confusing, unnecessary layer of abstraction. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--net/ipv4/tcp_memcontrol.c61
1 files changed, 18 insertions, 43 deletions
diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index 86feaa0d6d70..03e9154f7e68 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c
@@ -6,15 +6,10 @@
#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;
+ sk->sk_cgrp->memory_pressure = 1;
}
EXPORT_SYMBOL(memcg_tcp_enter_memory_pressure);
@@ -27,33 +22,24 @@ int tcp_init_cgroup(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
*/
struct res_counter *res_parent = NULL;
struct cg_proto *cg_proto, *parent_cg;
- struct tcp_memcontrol *tcp;
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;
+ cg_proto->sysctl_mem[0] = sysctl_tcp_mem[0];
+ cg_proto->sysctl_mem[1] = sysctl_tcp_mem[1];
+ cg_proto->sysctl_mem[2] = sysctl_tcp_mem[2];
+ cg_proto->memory_pressure = 0;
+ cg_proto->memcg = memcg;
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);
+ res_parent = &parent_cg->memory_allocated;
- 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;
+ res_counter_init(&cg_proto->memory_allocated, res_parent);
+ percpu_counter_init(&cg_proto->sockets_allocated, 0);
return 0;
}
@@ -62,20 +48,17 @@ EXPORT_SYMBOL(tcp_init_cgroup);
void tcp_destroy_cgroup(struct mem_cgroup *memcg)
{
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);
+ percpu_counter_destroy(&cg_proto->sockets_allocated);
}
EXPORT_SYMBOL(tcp_destroy_cgroup);
static int tcp_update_limit(struct mem_cgroup *memcg, u64 val)
{
- struct tcp_memcontrol *tcp;
struct cg_proto *cg_proto;
u64 old_lim;
int i;
@@ -88,16 +71,14 @@ static int tcp_update_limit(struct mem_cgroup *memcg, u64 val)
if (val > RES_COUNTER_MAX)
val = RES_COUNTER_MAX;
- tcp = tcp_from_cgproto(cg_proto);
-
- old_lim = res_counter_read_u64(&tcp->tcp_memory_allocated, RES_LIMIT);
- ret = res_counter_set_limit(&tcp->tcp_memory_allocated, val);
+ old_lim = res_counter_read_u64(&cg_proto->memory_allocated, RES_LIMIT);
+ ret = res_counter_set_limit(&cg_proto->memory_allocated, val);
if (ret)
return ret;
for (i = 0; i < 3; i++)
- tcp->tcp_prot_mem[i] = min_t(long, val >> PAGE_SHIFT,
- sysctl_tcp_mem[i]);
+ cg_proto->sysctl_mem[i] = min_t(long, val >> PAGE_SHIFT,
+ sysctl_tcp_mem[i]);
if (val == RES_COUNTER_MAX)
clear_bit(MEMCG_SOCK_ACTIVE, &cg_proto->flags);
@@ -154,28 +135,24 @@ static int tcp_cgroup_write(struct cgroup_subsys_state *css, struct cftype *cft,
static u64 tcp_read_stat(struct mem_cgroup *memcg, int type, u64 default_val)
{
- struct tcp_memcontrol *tcp;
struct cg_proto *cg_proto;
cg_proto = tcp_prot.proto_cgroup(memcg);
if (!cg_proto)
return default_val;
- tcp = tcp_from_cgproto(cg_proto);
- return res_counter_read_u64(&tcp->tcp_memory_allocated, type);
+ return res_counter_read_u64(&cg_proto->memory_allocated, type);
}
static u64 tcp_read_usage(struct mem_cgroup *memcg)
{
- struct tcp_memcontrol *tcp;
struct cg_proto *cg_proto;
cg_proto = tcp_prot.proto_cgroup(memcg);
if (!cg_proto)
return atomic_long_read(&tcp_memory_allocated) << PAGE_SHIFT;
- tcp = tcp_from_cgproto(cg_proto);
- return res_counter_read_u64(&tcp->tcp_memory_allocated, RES_USAGE);
+ return res_counter_read_u64(&cg_proto->memory_allocated, RES_USAGE);
}
static u64 tcp_cgroup_read(struct cgroup_subsys_state *css, struct cftype *cft)
@@ -203,21 +180,19 @@ static u64 tcp_cgroup_read(struct cgroup_subsys_state *css, struct cftype *cft)
static int tcp_cgroup_reset(struct cgroup_subsys_state *css, unsigned int event)
{
struct mem_cgroup *memcg;
- struct tcp_memcontrol *tcp;
struct cg_proto *cg_proto;
memcg = mem_cgroup_from_css(css);
cg_proto = tcp_prot.proto_cgroup(memcg);
if (!cg_proto)
return 0;
- tcp = tcp_from_cgproto(cg_proto);
switch (event) {
case RES_MAX_USAGE:
- res_counter_reset_max(&tcp->tcp_memory_allocated);
+ res_counter_reset_max(&cg_proto->memory_allocated);
break;
case RES_FAILCNT:
- res_counter_reset_failcnt(&tcp->tcp_memory_allocated);
+ res_counter_reset_failcnt(&cg_proto->memory_allocated);
break;
}