kernel-ark/net/ipv6/sysctl_net_ipv6.c
Pavel Emelyanov 8d8354d2fb [NETNS][FRAGS]: Move ctl tables around.
This is a preparation for sysctl netns-ization.
Move the ctl tables to the files, where the tuning
variables reside. Plus make the helpers to register
the tables.

This will simplify the later patches and will keep
similar things closer to each other.

ipv4, ipv6 and conntrack_reasm are patched differently,
but the result is all the tables are in appropriate files.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:10:34 -08:00

154 lines
3.7 KiB
C

/*
* sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
*
* Changes:
* YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
*/
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/inet_frag.h>
static ctl_table ipv6_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE,
.procname = "route",
.maxlen = 0,
.mode = 0555,
.child = ipv6_route_table_template
},
{
.ctl_name = NET_IPV6_ICMP,
.procname = "icmp",
.maxlen = 0,
.mode = 0555,
.child = ipv6_icmp_table_template
},
{
.ctl_name = NET_IPV6_BINDV6ONLY,
.procname = "bindv6only",
.data = &init_net.ipv6.sysctl.bindv6only,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = NET_IPV6_MLD_MAX_MSF,
.procname = "mld_max_msf",
.data = &sysctl_mld_max_msf,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{ .ctl_name = 0 }
};
struct ctl_path net_ipv6_ctl_path[] = {
{ .procname = "net", .ctl_name = CTL_NET, },
{ .procname = "ipv6", .ctl_name = NET_IPV6, },
{ },
};
EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
static int ipv6_sysctl_net_init(struct net *net)
{
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
int err;
err = -ENOMEM;
ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
GFP_KERNEL);
if (!ipv6_table)
goto out;
ipv6_route_table = ipv6_route_sysctl_init(net);
if (!ipv6_route_table)
goto out_ipv6_table;
ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
if (!ipv6_icmp_table)
goto out_ipv6_route_table;
ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
/* ipv6_route_table[1].data will be handled when we have
routes per namespace */
ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
ipv6_table[0].child = ipv6_route_table;
ipv6_icmp_table[0].data = &net->ipv6.sysctl.icmpv6_time;
ipv6_table[1].child = ipv6_icmp_table;
ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
/* We don't want this value to be per namespace, it should be global
to all namespaces, so make it read-only when we are not in the
init network namespace */
if (net != &init_net)
ipv6_table[3].mode = 0444;
net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
ipv6_table);
if (!net->ipv6.sysctl.table)
return -ENOMEM;
if (!net->ipv6.sysctl.table)
goto out_ipv6_icmp_table;
err = 0;
out:
return err;
out_ipv6_icmp_table:
kfree(ipv6_icmp_table);
out_ipv6_route_table:
kfree(ipv6_route_table);
out_ipv6_table:
kfree(ipv6_table);
goto out;
}
static void ipv6_sysctl_net_exit(struct net *net)
{
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
ipv6_route_table = ipv6_table[0].child;
ipv6_icmp_table = ipv6_table[1].child;
unregister_net_sysctl_table(net->ipv6.sysctl.table);
kfree(ipv6_table);
kfree(ipv6_route_table);
kfree(ipv6_icmp_table);
}
static struct pernet_operations ipv6_sysctl_net_ops = {
.init = ipv6_sysctl_net_init,
.exit = ipv6_sysctl_net_exit,
};
int ipv6_sysctl_register(void)
{
return register_pernet_subsys(&ipv6_sysctl_net_ops);
}
void ipv6_sysctl_unregister(void)
{
unregister_pernet_subsys(&ipv6_sysctl_net_ops);
}