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[NETNS]: struct net content re-work (v3)

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Recently David Miller and Herbert Xu pointed out that struct net becomes
overbloated and un-maintainable. There are two solutions:
- provide a pointer to a network subsystem definition from struct net.
  This costs an additional dereferrence
- place sub-system definition into the structure itself. This will speedup
  run-time access at the cost of recompilation time

The second approach looks better for us. Other sub-systems will follow.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2007-12-11 04:19:17 -08:00 committed by David S. Miller
parent 27147c9e6e
commit a0a53c8ba9
4 changed files with 24 additions and 11 deletions
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6
include/net/net_namespace.h
View File

@ -8,6 +8,8 @@
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <linux/list.h> #include <linux/list.h>
#include <net/netns/unix.h>
struct proc_dir_entry; struct proc_dir_entry;
struct net_device; struct net_device;
struct sock; struct sock;
@ -45,9 +47,7 @@ struct net {
rwlock_t packet_sklist_lock; rwlock_t packet_sklist_lock;
struct hlist_head packet_sklist; struct hlist_head packet_sklist;
/* unix sockets */ struct netns_unix unx;
int sysctl_unix_max_dgram_qlen;
struct ctl_table_header *unix_ctl;
}; };
#ifdef CONFIG_NET #ifdef CONFIG_NET

13
include/net/netns/unix.h Normal file
View File

@ -0,0 +1,13 @@
/*
* Unix network namespace
*/
#ifndef __NETNS_UNIX_H__
#define __NETNS_UNIX_H__
struct ctl_table_header;
struct netns_unix {
int sysctl_max_dgram_qlen;
struct ctl_table_header *ctl;
};
#endif /* __NETNS_UNIX_H__ */

4
net/unix/af_unix.c
View File

@ -592,7 +592,7 @@ static struct sock * unix_create1(struct net *net, struct socket *sock)
&af_unix_sk_receive_queue_lock_key); &af_unix_sk_receive_queue_lock_key);
sk->sk_write_space = unix_write_space; sk->sk_write_space = unix_write_space;
sk->sk_max_ack_backlog = net->sysctl_unix_max_dgram_qlen; sk->sk_max_ack_backlog = net->unx.sysctl_max_dgram_qlen;
sk->sk_destruct = unix_sock_destructor; sk->sk_destruct = unix_sock_destructor;
u = unix_sk(sk); u = unix_sk(sk);
u->dentry = NULL; u->dentry = NULL;
@ -2138,7 +2138,7 @@ static int unix_net_init(struct net *net)
{ {
int error = -ENOMEM; int error = -ENOMEM;
net->sysctl_unix_max_dgram_qlen = 10; net->unx.sysctl_max_dgram_qlen = 10;
if (unix_sysctl_register(net)) if (unix_sysctl_register(net))
goto out; goto out;

12
net/unix/sysctl_net_unix.c
View File

@ -18,7 +18,7 @@ static ctl_table unix_table[] = {
{ {
.ctl_name = NET_UNIX_MAX_DGRAM_QLEN, .ctl_name = NET_UNIX_MAX_DGRAM_QLEN,
.procname = "max_dgram_qlen", .procname = "max_dgram_qlen",
.data = &init_net.sysctl_unix_max_dgram_qlen, .data = &init_net.unx.sysctl_max_dgram_qlen,
.maxlen = sizeof(int), .maxlen = sizeof(int),
.mode = 0644, .mode = 0644,
.proc_handler = &proc_dointvec .proc_handler = &proc_dointvec
@ -40,9 +40,9 @@ int unix_sysctl_register(struct net *net)
if (table == NULL) if (table == NULL)
goto err_alloc; goto err_alloc;
table[0].data = &net->sysctl_unix_max_dgram_qlen; table[0].data = &net->unx.sysctl_max_dgram_qlen;
net->unix_ctl = register_net_sysctl_table(net, unix_path, table); net->unx.ctl = register_net_sysctl_table(net, unix_path, table);
if (net->unix_ctl == NULL) if (net->unx.ctl == NULL)
goto err_reg; goto err_reg;
return 0; return 0;
@ -57,8 +57,8 @@ void unix_sysctl_unregister(struct net *net)
{ {
struct ctl_table *table; struct ctl_table *table;
table = net->unix_ctl->ctl_table_arg; table = net->unx.ctl->ctl_table_arg;
unregister_sysctl_table(net->unix_ctl); unregister_sysctl_table(net->unx.ctl);
kfree(table); kfree(table);
} }