Function ng_bridge_constructor

freebsd/netgraph/ng_bridge.c:292–328

* Node constructor */

 * Node constructor
 */
static int
ng_bridge_constructor(node_p node)
{
	priv_p priv;

	/* Allocate and initialize private info */
	priv = malloc(sizeof(*priv), M_NETGRAPH_BRIDGE, M_WAITOK | M_ZERO);
	ng_callout_init(&priv->timer);

	/* Allocate and initialize hash table, etc. */
	priv->tab = malloc(MIN_BUCKETS * sizeof(*priv->tab),
	    M_NETGRAPH_BRIDGE, M_WAITOK | M_ZERO);
	priv->numBuckets = MIN_BUCKETS;
	priv->hashMask = MIN_BUCKETS - 1;
	priv->conf.debugLevel = 1;
	priv->conf.loopTimeout = DEFAULT_LOOP_TIMEOUT;
	priv->conf.maxStaleness = DEFAULT_MAX_STALENESS;
	priv->conf.minStableAge = DEFAULT_MIN_STABLE_AGE;

	/*
	 * This node has all kinds of stuff that could be screwed by SMP.
	 * Until it gets it's own internal protection, we go through in 
	 * single file. This could hurt a machine bridging between two 
	 * GB ethernets so it should be fixed. 
	 * When it's fixed the process SHOULD NOT SLEEP, spinlocks please!
	 * (and atomic ops )
	 */
	NG_NODE_FORCE_WRITER(node);
	NG_NODE_SET_PRIVATE(node, priv);
	priv->node = node;

	/* Start timer; timer is always running while node is alive */
	ng_callout(&priv->timer, node, NULL, hz, ng_bridge_timeout, NULL, 0);

	/* Done */
	return (0);
}

/*
 * Method for attaching a new hook