C++ (Cpp) fib_hash_table Examples

Example #1

File: fib_frontend.c Project: Alone-wyr/linux-kernel.

static int __net_init fib4_rules_init(struct net *net)
{
	struct fib_table *local_table, *main_table;
	//分别为LOCAL和MAIN分配fib_table..
	local_table = fib_hash_table(RT_TABLE_LOCAL);
	if (local_table == NULL)
		return -ENOMEM;

	main_table  = fib_hash_table(RT_TABLE_MAIN);
	if (main_table == NULL)
		goto fail;
	//fib_table_hash为调用该函数时候分配的一个hash数组..也是只有2个数组项...
	//因此就是把fib_table分别添加到对应的hlist上..
	hlist_add_head_rcu(&local_table->tb_hlist, &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]);
	hlist_add_head_rcu(&main_table->tb_hlist, &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]);
	return 0;

fail:
	kfree(local_table);
	return -ENOMEM;
}

Example #2

static int __net_init fib4_rules_init(struct net *net)
{
	struct fib_table *local_table, *main_table;

	local_table = fib_hash_table(RT_TABLE_LOCAL);
	if (local_table == NULL)
		return -ENOMEM;

	main_table  = fib_hash_table(RT_TABLE_MAIN);
	if (main_table == NULL)
		goto fail;

	hlist_add_head_rcu(&local_table->tb_hlist,
				&net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]);
	hlist_add_head_rcu(&main_table->tb_hlist,
				&net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]);
	return 0;

fail:
	kfree(local_table);
	return -ENOMEM;
}

Example #3

struct fib_table *fib_new_table(struct net *net, u32 id)
{
	struct fib_table *tb;
	unsigned int h;

	if (id == 0)
		id = RT_TABLE_MAIN;
	tb = fib_get_table(net, id);
	if (tb)
		return tb;

	tb = fib_hash_table(id);
	if (!tb)
		return NULL;
	h = id & (FIB_TABLE_HASHSZ - 1);
	hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]);
	return tb;
}