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ipv6: do not allow ipv6 module to be removed

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There was some bug report on ipv6 module removal path before.
Also, as Stephen pointed out, after vxlan module gets ipv6 support,
the ipv6 stub it used is not safe against this module removal either.
So, let's just remove inet6_exit() so that ipv6 module will not be
able to be unloaded.

Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2013-09-21 11:12:21 +08:00 committed by David S. Miller
parent b0983d3c9b
commit 8ce4406103
1 changed files with 0 additions and 48 deletions
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48
net/ipv6/af_inet6.c
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@ -1028,52 +1028,4 @@ static int __init inet6_init(void)
}
module_init(inet6_init);
static void __exit inet6_exit(void)
{
if (disable_ipv6_mod)
return;
/* First of all disallow new sockets creation. */
sock_unregister(PF_INET6);
/* Disallow any further netlink messages */
rtnl_unregister_all(PF_INET6);
udpv6_exit();
udplitev6_exit();
tcpv6_exit();
/* Cleanup code parts. */
ipv6_packet_cleanup();
ipv6_frag_exit();
ipv6_exthdrs_exit();
addrconf_cleanup();
ip6_flowlabel_cleanup();
ndisc_late_cleanup();
ip6_route_cleanup();
#ifdef CONFIG_PROC_FS
/* Cleanup code parts. */
if6_proc_exit();
ipv6_misc_proc_exit();
udplite6_proc_exit();
raw6_proc_exit();
#endif
ipv6_netfilter_fini();
ipv6_stub = NULL;
igmp6_cleanup();
ndisc_cleanup();
ip6_mr_cleanup();
icmpv6_cleanup();
rawv6_exit();
unregister_pernet_subsys(&inet6_net_ops);
proto_unregister(&rawv6_prot);
proto_unregister(&udplitev6_prot);
proto_unregister(&udpv6_prot);
proto_unregister(&tcpv6_prot);
rcu_barrier(); /* Wait for completion of call_rcu()'s */
}
module_exit(inet6_exit);
MODULE_ALIAS_NETPROTO(PF_INET6);