-int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
-{
- int ret = 0;
-
- write_lock_bh(&nf_conntrack_lock);
- if (nf_ct_l3protos[proto->l3proto] != &nf_conntrack_generic_l3proto) {
- ret = -EBUSY;
- goto out;
- }
- nf_ct_l3protos[proto->l3proto] = proto;
-out:
- write_unlock_bh(&nf_conntrack_lock);
-
- return ret;
-}
-
-void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
-{
- write_lock_bh(&nf_conntrack_lock);
- nf_ct_l3protos[proto->l3proto] = &nf_conntrack_generic_l3proto;
- write_unlock_bh(&nf_conntrack_lock);
-
- /* Somebody could be still looking at the proto in bh. */
- synchronize_net();
-
- /* Remove all contrack entries for this protocol */
- nf_ct_iterate_cleanup(kill_l3proto, proto);
-}
-
-/* FIXME: Allow NULL functions and sub in pointers to generic for
- them. --RR */
-int nf_conntrack_protocol_register(struct nf_conntrack_protocol *proto)
-{
- int ret = 0;
-
-retry:
- write_lock_bh(&nf_conntrack_lock);
- if (nf_ct_protos[proto->l3proto]) {
- if (nf_ct_protos[proto->l3proto][proto->proto]
- != &nf_conntrack_generic_protocol) {
- ret = -EBUSY;
- goto out_unlock;
- }
- } else {
- /* l3proto may be loaded latter. */
- struct nf_conntrack_protocol **proto_array;
- int i;
-
- write_unlock_bh(&nf_conntrack_lock);
-
- proto_array = (struct nf_conntrack_protocol **)
- kmalloc(MAX_NF_CT_PROTO *
- sizeof(struct nf_conntrack_protocol *),
- GFP_KERNEL);
- if (proto_array == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- for (i = 0; i < MAX_NF_CT_PROTO; i++)
- proto_array[i] = &nf_conntrack_generic_protocol;
-
- write_lock_bh(&nf_conntrack_lock);
- if (nf_ct_protos[proto->l3proto]) {
- /* bad timing, but no problem */
- write_unlock_bh(&nf_conntrack_lock);
- kfree(proto_array);
- } else {
- nf_ct_protos[proto->l3proto] = proto_array;
- write_unlock_bh(&nf_conntrack_lock);
- }
-
- /*
- * Just once because array is never freed until unloading
- * nf_conntrack.ko
- */
- goto retry;
- }
-
- nf_ct_protos[proto->l3proto][proto->proto] = proto;
-
-out_unlock:
- write_unlock_bh(&nf_conntrack_lock);
-out:
- return ret;
-}
-
-void nf_conntrack_protocol_unregister(struct nf_conntrack_protocol *proto)
-{
- write_lock_bh(&nf_conntrack_lock);
- nf_ct_protos[proto->l3proto][proto->proto]
- = &nf_conntrack_generic_protocol;
- write_unlock_bh(&nf_conntrack_lock);
-
- /* Somebody could be still looking at the proto in bh. */
- synchronize_net();
-
- /* Remove all contrack entries for this protocol */
- nf_ct_iterate_cleanup(kill_proto, proto);
-}
-