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[NET] sysctl: make sysctl_somaxconn per-namespace 

Just move the variable on the struct net and adjust
its usage.

Others sysctls from sys.net.core table are more
difficult to virtualize (i.e. make them per-namespace),
but I'll look at them as well a bit later.

Signed-off-by: Pavel Emelyanov <xemul@oenvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-12-08 00:12:33 -08:00 committed by David S. Miller
parent 790a353289
commit b8e1f9b5c3
4 changed files with 8 additions and 6 deletions
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1
include/linux/socket.h
View File

@ -24,7 +24,6 @@ struct __kernel_sockaddr_storage {
#include <linux/types.h> /* pid_t */
#include <linux/compiler.h> /* __user */
extern int sysctl_somaxconn;
#ifdef CONFIG_PROC_FS
struct seq_file;
extern void socket_seq_show(struct seq_file *seq);

1
include/net/net_namespace.h
View File

@ -39,6 +39,7 @@ struct net {
/* core sysctls */
struct ctl_table_header *sysctl_core_hdr;
int sysctl_somaxconn;
/* List of all packet sockets. */
rwlock_t packet_sklist_lock;

4
net/core/sysctl_net_core.c
View File

@ -127,7 +127,7 @@ static struct ctl_table net_core_table[] = {
{
.ctl_name = NET_CORE_SOMAXCONN,
.procname = "somaxconn",
.data = &sysctl_somaxconn,
.data = &init_net.sysctl_somaxconn,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@ -161,6 +161,8 @@ static __net_init int sysctl_core_net_init(struct net *net)
{
struct ctl_table *tbl, *tmp;
net->sysctl_somaxconn = SOMAXCONN;
tbl = net_core_table;
if (net != &init_net) {
tbl = kmemdup(tbl, sizeof(net_core_table), GFP_KERNEL);

8
net/socket.c
View File

@ -1365,17 +1365,17 @@ asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
* ready for listening.
*/
int sysctl_somaxconn __read_mostly = SOMAXCONN;
asmlinkage long sys_listen(int fd, int backlog)
{
struct socket *sock;
int err, fput_needed;
int somaxconn;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock) {
if ((unsigned)backlog > sysctl_somaxconn)
backlog = sysctl_somaxconn;
somaxconn = sock->sk->sk_net->sysctl_somaxconn;
if ((unsigned)backlog > somaxconn)
backlog = somaxconn;
err = security_socket_listen(sock, backlog);
if (!err)