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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
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16
net/ipv4/ip_fragment.c
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@@ -624,6 +624,10 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = {
.proc_handler = &proc_dointvec_jiffies,
.strategy = &sysctl_jiffies
},
{ }
};
static struct ctl_table ip4_frags_ctl_table[] = {
{
.ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL,
.procname = "ipfrag_secret_interval",
@@ -658,8 +662,6 @@ static int ip4_frags_ns_ctl_register(struct net *net)
table[0].data = &net->ipv4.frags.high_thresh;
table[1].data = &net->ipv4.frags.low_thresh;
table[2].data = &net->ipv4.frags.timeout;
table[3].mode &= ~0222;
table[4].mode &= ~0222;
}
hdr = register_net_sysctl_table(net, net_ipv4_ctl_path, table);
@@ -684,6 +686,11 @@ static void ip4_frags_ns_ctl_unregister(struct net *net)
unregister_net_sysctl_table(net->ipv4.frags_hdr);
kfree(table);
}
static void ip4_frags_ctl_register(void)
{
register_net_sysctl_rotable(net_ipv4_ctl_path, ip4_frags_ctl_table);
}
#else
static inline int ip4_frags_ns_ctl_register(struct net *net)
{
@@ -693,6 +700,10 @@ static inline int ip4_frags_ns_ctl_register(struct net *net)
static inline void ip4_frags_ns_ctl_unregister(struct net *net)
{
}
static inline void ip4_frags_ctl_register(void)
{
}
#endif
static int ipv4_frags_init_net(struct net *net)
@@ -730,6 +741,7 @@ static struct pernet_operations ip4_frags_ops = {
void __init ipfrag_init(void)
{
ip4_frags_ctl_register();
register_pernet_subsys(&ip4_frags_ops);
ip4_frags.hashfn = ip4_hashfn;
ip4_frags.constructor = ip4_frag_init;