netfilter: nftables: add helper function to release hooks of one single table

Add a function to release the hooks of one single table.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Author: ummakynes

net/netfilter/nf_tables_api.c

@@ -8988,15 +8988,20 @@ int __nft_release_basechain(struct nft_ctx *ctx)
 }
 EXPORT_SYMBOL_GPL(__nft_release_basechain);
 
+static void __nft_release_hook(struct net *net, struct nft_table *table)
+{
+	struct nft_chain *chain;
+
+	list_for_each_entry(chain, &table->chains, list)
+		nf_tables_unregister_hook(net, table, chain);
+}
+
 static void __nft_release_hooks(struct net *net)
 {
 	struct nft_table *table;
-	struct nft_chain *chain;
 
-	list_for_each_entry(table, &net->nft.tables, list) {
-		list_for_each_entry(chain, &table->chains, list)
-			nf_tables_unregister_hook(net, table, chain);
-	}
+	list_for_each_entry(table, &net->nft.tables, list)
+		__nft_release_hook(net, table);
 }
 
 static void __nft_release_table(struct net *net, struct nft_table *table)