netfilter: move table iteration out of netns exit paths
We only need to iterate & remove in case of module removal; for netns destruction all conntracks will be removed anyway. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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202f59afd4
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2c41f33c1b
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@ -265,6 +265,8 @@ void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto)
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mutex_unlock(&nf_ct_proto_mutex);
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synchronize_rcu();
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/* Remove all contrack entries for this protocol */
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nf_ct_iterate_destroy(kill_l3proto, proto);
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}
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EXPORT_SYMBOL_GPL(nf_ct_l3proto_unregister);
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@ -280,9 +282,6 @@ void nf_ct_l3proto_pernet_unregister(struct net *net,
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*/
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if (proto->net_ns_put)
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proto->net_ns_put(net);
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/* Remove all contrack entries for this protocol */
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nf_ct_iterate_cleanup_net(net, kill_l3proto, proto, 0, 0);
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}
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EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister);
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@ -421,17 +420,23 @@ out:
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}
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EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_register_one);
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void nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
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static void __nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
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{
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BUG_ON(l4proto->l3proto >= PF_MAX);
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mutex_lock(&nf_ct_proto_mutex);
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BUG_ON(rcu_dereference_protected(
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nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
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lockdep_is_held(&nf_ct_proto_mutex)
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) != l4proto);
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rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
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&nf_conntrack_l4proto_generic);
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}
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void nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
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{
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mutex_lock(&nf_ct_proto_mutex);
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__nf_ct_l4proto_unregister_one(l4proto);
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mutex_unlock(&nf_ct_proto_mutex);
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synchronize_rcu();
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@ -448,9 +453,6 @@ void nf_ct_l4proto_pernet_unregister_one(struct net *net,
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pn->users--;
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nf_ct_l4proto_unregister_sysctl(net, pn, l4proto);
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/* Remove all contrack entries for this protocol */
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nf_ct_iterate_cleanup_net(net, kill_l4proto, l4proto, 0, 0);
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}
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EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_unregister_one);
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@ -500,8 +502,14 @@ EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_register);
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void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *l4proto[],
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unsigned int num_proto)
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{
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mutex_lock(&nf_ct_proto_mutex);
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while (num_proto-- != 0)
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nf_ct_l4proto_unregister_one(l4proto[num_proto]);
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__nf_ct_l4proto_unregister_one(l4proto[num_proto]);
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mutex_unlock(&nf_ct_proto_mutex);
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synchronize_net();
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/* Remove all contrack entries for this protocol */
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nf_ct_iterate_destroy(kill_l4proto, l4proto);
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}
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EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister);
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