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ipv6: Register some net/ipv6/ core sysctls at read-only root. 

There are some sysctls left to be switched to read-only,
but they are all in ipv6, so complete with them.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-05-19 13:53:30 -07:00 committed by David S. Miller
parent 7d291ebb83
commit 34ac2573e8
1 changed files with 22 additions and 7 deletions
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29
net/ipv6/sysctl_net_ipv6.c
View File

@ -37,6 +37,10 @@ static ctl_table ipv6_table_template[] = {
.mode = 0644,
.proc_handler = &proc_dointvec
},
{ .ctl_name = 0 }
};
static ctl_table ipv6_table[] = {
{
.ctl_name = NET_IPV6_MLD_MAX_MSF,
.procname = "mld_max_msf",
@ -80,12 +84,6 @@ static int ipv6_sysctl_net_init(struct net *net)
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)
@ -126,12 +124,29 @@ static struct pernet_operations ipv6_sysctl_net_ops = {
.exit = ipv6_sysctl_net_exit,
};
static struct ctl_table_header *ip6_header;
int ipv6_sysctl_register(void)
{
return register_pernet_subsys(&ipv6_sysctl_net_ops);
int err = -ENOMEM;;
ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_table);
if (ip6_header == NULL)
goto out;
err = register_pernet_subsys(&ipv6_sysctl_net_ops);
if (err)
goto err_pernet;
out:
return err;
err_pernet:
unregister_net_sysctl_table(ip6_header);
goto out;
}
void ipv6_sysctl_unregister(void)
{
unregister_net_sysctl_table(ip6_header);
unregister_pernet_subsys(&ipv6_sysctl_net_ops);
}