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inet: Register fragmentation some ctls at read-only root.

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Parts of fragments-related sysctls are read-only, but this is
done by cloning all the tables and dropping write-bits from
mode. Do the same but with read-only root.

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 13:53:02 -07:00
committed by David S. Miller
parent 0002c630c4
commit 7d291ebb83
2 changed files with 48 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
net/ipv6/reassembly.c
View File

@@ -658,6 +658,10 @@ static struct ctl_table ip6_frags_ns_ctl_table[] = {
.proc_handler = &proc_dointvec_jiffies,
.strategy = &sysctl_jiffies,
},
{ }
};
static struct ctl_table ip6_frags_ctl_table[] = {
{
.ctl_name = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
.procname = "ip6frag_secret_interval",
@@ -684,7 +688,6 @@ static int ip6_frags_ns_sysctl_register(struct net *net)
table[0].data = &net->ipv6.frags.high_thresh;
table[1].data = &net->ipv6.frags.low_thresh;
table[2].data = &net->ipv6.frags.timeout;
table[3].mode &= ~0222;
}
hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, table);
@@ -709,6 +712,20 @@ static void ip6_frags_ns_sysctl_unregister(struct net *net)
unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);
kfree(table);
}
static struct ctl_table_header *ip6_ctl_header;
static int ip6_frags_sysctl_register(void)
{
ip6_ctl_header = register_net_sysctl_rotable(net_ipv6_ctl_path,
ip6_frags_ctl_table);
return ip6_ctl_header == NULL ? -ENOMEM : 0;
}
static void ip6_frags_sysctl_unregister(void)
{
unregister_net_sysctl_table(ip6_ctl_header);
}
#else
static inline int ip6_frags_ns_sysctl_register(struct net *net)
{
@@ -718,6 +735,15 @@ static inline int ip6_frags_ns_sysctl_register(struct net *net)
static inline void ip6_frags_ns_sysctl_unregister(struct net *net)
{
}
static inline int ip6_frags_sysctl_register(void)
{
return 0;
}
static inline void ip6_frags_sysctl_unregister(void)
{
}
#endif
static int ipv6_frags_init_net(struct net *net)
@@ -750,6 +776,10 @@ int __init ipv6_frag_init(void)
if (ret)
goto out;
ret = ip6_frags_sysctl_register();
if (ret)
goto err_sysctl;
ret = register_pernet_subsys(&ip6_frags_ops);
if (ret)
goto err_pernet;
@@ -767,6 +797,8 @@ out:
return ret;
err_pernet:
ip6_frags_sysctl_unregister();
err_sysctl:
inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
goto out;
}
@@ -774,6 +806,7 @@ err_pernet:
void ipv6_frag_exit(void)
{
inet_frags_fini(&ip6_frags);
ip6_frags_sysctl_unregister();
unregister_pernet_subsys(&ip6_frags_ops);
inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
}