Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 188 insertions, 0 deletions

diff --git a/net/bridge/br_stp_timer.c b/net/bridge/br_stp_timer.c
new file mode 100644
index 000000000000..9bef55f56425
--- /dev/null
+++ b/net/bridge/br_stp_timer.c
@@ -0,0 +1,188 @@
+/*
+ *	Spanning tree protocol; timer-related code
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	$Id: br_stp_timer.c,v 1.3 2000/05/05 02:17:17 davem Exp $
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/times.h>
+#include <linux/smp_lock.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+/* called under bridge lock */
+static int br_is_designated_for_some_port(const struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED &&
+		    !memcmp(&p->designated_bridge, &br->bridge_id, 8)) 
+			return 1;
+	}
+
+	return 0;
+}
+
+static void br_hello_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *)arg;
+	
+	pr_debug("%s: hello timer expired\n", br->dev->name);
+	spin_lock_bh(&br->lock);
+	if (br->dev->flags & IFF_UP) {
+		br_config_bpdu_generation(br);
+
+		mod_timer(&br->hello_timer, jiffies + br->hello_time);
+	}
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_message_age_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+	struct net_bridge *br = p->br;
+	const bridge_id *id = &p->designated_bridge;
+	int was_root;
+
+	if (p->state == BR_STATE_DISABLED)
+		return;
+
+	
+	pr_info("%s: neighbor %.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x lost on port %d(%s)\n",
+		br->dev->name, 
+		id->prio[0], id->prio[1], 
+		id->addr[0], id->addr[1], id->addr[2], 
+		id->addr[3], id->addr[4], id->addr[5],
+		p->port_no, p->dev->name);
+
+	/*
+	 * According to the spec, the message age timer cannot be
+	 * running when we are the root bridge. So..  this was_root
+	 * check is redundant. I'm leaving it in for now, though.
+	 */
+	spin_lock_bh(&br->lock);
+	if (p->state == BR_STATE_DISABLED)
+		goto unlock;
+	was_root = br_is_root_bridge(br);
+
+	br_become_designated_port(p);
+	br_configuration_update(br);
+	br_port_state_selection(br);
+	if (br_is_root_bridge(br) && !was_root)
+		br_become_root_bridge(br);
+ unlock:
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_forward_delay_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+	struct net_bridge *br = p->br;
+
+	pr_debug("%s: %d(%s) forward delay timer\n",
+		 br->dev->name, p->port_no, p->dev->name);
+	spin_lock_bh(&br->lock);
+	if (p->state == BR_STATE_LISTENING) {
+		p->state = BR_STATE_LEARNING;
+		mod_timer(&p->forward_delay_timer,
+			  jiffies + br->forward_delay);
+	} else if (p->state == BR_STATE_LEARNING) {
+		p->state = BR_STATE_FORWARDING;
+		if (br_is_designated_for_some_port(br))
+			br_topology_change_detection(br);
+	}
+	br_log_state(p);
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_tcn_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *) arg;
+
+	pr_debug("%s: tcn timer expired\n", br->dev->name);
+	spin_lock_bh(&br->lock);
+	if (br->dev->flags & IFF_UP) {
+		br_transmit_tcn(br);
+	
+		mod_timer(&br->tcn_timer,jiffies + br->bridge_hello_time);
+	}
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_topology_change_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *) arg;
+
+	pr_debug("%s: topo change timer expired\n", br->dev->name);
+	spin_lock_bh(&br->lock);
+	br->topology_change_detected = 0;
+	br->topology_change = 0;
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_hold_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+
+	pr_debug("%s: %d(%s) hold timer expired\n", 
+		 p->br->dev->name,  p->port_no, p->dev->name);
+
+	spin_lock_bh(&p->br->lock);
+	if (p->config_pending)
+		br_transmit_config(p);
+	spin_unlock_bh(&p->br->lock);
+}
+
+static inline void br_timer_init(struct timer_list *timer,
+			  void (*_function)(unsigned long),
+			  unsigned long _data)
+{
+	init_timer(timer);
+	timer->function = _function;
+	timer->data = _data;
+}
+
+void br_stp_timer_init(struct net_bridge *br)
+{
+	br_timer_init(&br->hello_timer, br_hello_timer_expired,
+		      (unsigned long) br);
+
+	br_timer_init(&br->tcn_timer, br_tcn_timer_expired, 
+		      (unsigned long) br);
+
+	br_timer_init(&br->topology_change_timer,
+		      br_topology_change_timer_expired,
+		      (unsigned long) br);
+
+	br_timer_init(&br->gc_timer, br_fdb_cleanup, (unsigned long) br);
+}
+
+void br_stp_port_timer_init(struct net_bridge_port *p)
+{
+	br_timer_init(&p->message_age_timer, br_message_age_timer_expired,
+		      (unsigned long) p);
+
+	br_timer_init(&p->forward_delay_timer, br_forward_delay_timer_expired,
+		      (unsigned long) p);
+		      
+	br_timer_init(&p->hold_timer, br_hold_timer_expired,
+		      (unsigned long) p);
+}	
+
+/* Report ticks left (in USER_HZ) used for API */
+unsigned long br_timer_value(const struct timer_list *timer)
+{
+	return timer_pending(timer)
+		? jiffies_to_clock_t(timer->expires - jiffies) : 0;
+}