1 files changed, 364 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
new file mode 100644
index 0000000..98cf53c
--- /dev/null
+++ b/net/bridge/br_sysfs_br.c
@@ -0,0 +1,364 @@
+/*
+ *	Sysfs attributes of bridge ports
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Stephen Hemminger		<shemminger@osdl.org>
+ *
+ *	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/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+
+#include "br_private.h"
+
+#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
+#define to_net_dev(class) container_of(class, struct net_device, class_dev)
+#define to_bridge(cd)	((struct net_bridge *)(to_net_dev(cd)->priv))
+
+/*
+ * Common code for storing bridge parameters.
+ */
+static ssize_t store_bridge_parm(struct class_device *cd,
+				 const char *buf, size_t len,
+				 void (*set)(struct net_bridge *, unsigned long))
+{
+	struct net_bridge *br = to_bridge(cd);
+	char *endp;
+	unsigned long val;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	spin_lock_bh(&br->lock);
+	(*set)(br, val);
+	spin_unlock_bh(&br->lock);
+	return len;
+}
+
+
+static ssize_t show_forward_delay(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
+}
+
+static void set_forward_delay(struct net_bridge *br, unsigned long val)
+{
+	unsigned long delay = clock_t_to_jiffies(val);
+	br->forward_delay = delay;
+	if (br_is_root_bridge(br))
+		br->bridge_forward_delay = delay;
+}
+
+static ssize_t store_forward_delay(struct class_device *cd, const char *buf,
+				   size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_forward_delay);
+}
+static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
+			 show_forward_delay, store_forward_delay);
+
+static ssize_t show_hello_time(struct class_device *cd, char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(cd)->hello_time));
+}
+
+static void set_hello_time(struct net_bridge *br, unsigned long val)
+{
+	unsigned long t = clock_t_to_jiffies(val);
+	br->hello_time = t;
+	if (br_is_root_bridge(br))
+		br->bridge_hello_time = t;
+}
+
+static ssize_t store_hello_time(struct class_device *cd, const char *buf,
+				size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_hello_time);
+}
+
+static CLASS_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
+			 store_hello_time);
+
+static ssize_t show_max_age(struct class_device *cd, char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(cd)->max_age));
+}
+
+static void set_max_age(struct net_bridge *br, unsigned long val)
+{
+	unsigned long t = clock_t_to_jiffies(val);
+	br->max_age = t;
+	if (br_is_root_bridge(br))
+		br->bridge_max_age = t;
+}
+
+static ssize_t store_max_age(struct class_device *cd, const char *buf,
+				size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_max_age);
+}
+
+static CLASS_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age,
+			 store_max_age);
+
+static ssize_t show_ageing_time(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
+}
+
+static void set_ageing_time(struct net_bridge *br, unsigned long val)
+{
+	br->ageing_time = clock_t_to_jiffies(val);
+}
+
+static ssize_t store_ageing_time(struct class_device *cd, const char *buf,
+				 size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_ageing_time);
+}
+
+static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
+			 store_ageing_time);
+static ssize_t show_stp_state(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%d\n", br->stp_enabled);
+}
+
+static void set_stp_state(struct net_bridge *br, unsigned long val)
+{
+	br->stp_enabled = val;
+}
+
+static ssize_t store_stp_state(struct class_device *cd,
+			       const char *buf, size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_stp_state);
+}
+
+static CLASS_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
+			 store_stp_state);
+
+static ssize_t show_priority(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%d\n",
+		       (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
+}
+
+static void set_priority(struct net_bridge *br, unsigned long val)
+{
+	br_stp_set_bridge_priority(br, (u16) val);
+}
+
+static ssize_t store_priority(struct class_device *cd,
+			       const char *buf, size_t len)
+{
+	return store_bridge_parm(cd, buf, len, set_priority);
+}
+static CLASS_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority,
+			 store_priority);
+
+static ssize_t show_root_id(struct class_device *cd, char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
+}
+static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
+
+static ssize_t show_bridge_id(struct class_device *cd, char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
+}
+static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
+
+static ssize_t show_root_port(struct class_device *cd, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
+}
+static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
+
+static ssize_t show_root_path_cost(struct class_device *cd, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
+}
+static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
+
+static ssize_t show_topology_change(struct class_device *cd, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
+}
+static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
+
+static ssize_t show_topology_change_detected(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%d\n", br->topology_change_detected);
+}
+static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL);
+
+static ssize_t show_hello_timer(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
+}
+static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
+
+static ssize_t show_tcn_timer(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
+}
+static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
+
+static ssize_t show_topology_change_timer(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
+}
+static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL);
+
+static ssize_t show_gc_timer(struct class_device *cd, char *buf)
+{
+	struct net_bridge *br = to_bridge(cd);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
+}
+static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
+
+static struct attribute *bridge_attrs[] = {
+	&class_device_attr_forward_delay.attr,
+	&class_device_attr_hello_time.attr,
+	&class_device_attr_max_age.attr,
+	&class_device_attr_ageing_time.attr,
+	&class_device_attr_stp_state.attr,
+	&class_device_attr_priority.attr,
+	&class_device_attr_bridge_id.attr,
+	&class_device_attr_root_id.attr,
+	&class_device_attr_root_path_cost.attr,
+	&class_device_attr_root_port.attr,
+	&class_device_attr_topology_change.attr,
+	&class_device_attr_topology_change_detected.attr,
+	&class_device_attr_hello_timer.attr,
+	&class_device_attr_tcn_timer.attr,
+	&class_device_attr_topology_change_timer.attr,
+	&class_device_attr_gc_timer.attr,
+	NULL
+};
+
+static struct attribute_group bridge_group = {
+	.name = SYSFS_BRIDGE_ATTR,
+	.attrs = bridge_attrs,
+};
+
+/*
+ * Export the forwarding information table as a binary file
+ * The records are struct __fdb_entry.
+ *
+ * Returns the number of bytes read.
+ */
+static ssize_t brforward_read(struct kobject *kobj, char *buf,
+			   loff_t off, size_t count)
+{
+	struct class_device *cdev = to_class_dev(kobj);
+	struct net_bridge *br = to_bridge(cdev);
+	int n;
+
+	/* must read whole records */
+	if (off % sizeof(struct __fdb_entry) != 0)
+		return -EINVAL;
+
+	n =  br_fdb_fillbuf(br, buf, 
+			    count / sizeof(struct __fdb_entry),
+			    off / sizeof(struct __fdb_entry));
+
+	if (n > 0)
+		n *= sizeof(struct __fdb_entry);
+	
+	return n;
+}
+
+static struct bin_attribute bridge_forward = {
+	.attr = { .name = SYSFS_BRIDGE_FDB,
+		  .mode = S_IRUGO, 
+		  .owner = THIS_MODULE, },
+	.read = brforward_read,
+};
+
+/*
+ * Add entries in sysfs onto the existing network class device
+ * for the bridge.
+ *   Adds a attribute group "bridge" containing tuning parameters.
+ *   Binary attribute containing the forward table
+ *   Sub directory to hold links to interfaces.
+ *
+ * Note: the ifobj exists only to be a subdirectory
+ *   to hold links.  The ifobj exists in same data structure
+ *   as it's parent the bridge so reference counting works.
+ */
+int br_sysfs_addbr(struct net_device *dev)
+{
+	struct kobject *brobj = &dev->class_dev.kobj;
+	struct net_bridge *br = netdev_priv(dev);
+	int err;
+
+	err = sysfs_create_group(brobj, &bridge_group);
+	if (err) {
+		pr_info("%s: can't create group %s/%s\n",
+			__FUNCTION__, dev->name, bridge_group.name);
+		goto out1;
+	}
+
+	err = sysfs_create_bin_file(brobj, &bridge_forward);
+	if (err) {
+		pr_info("%s: can't create attribue file %s/%s\n",
+			__FUNCTION__, dev->name, bridge_forward.attr.name);
+		goto out2;
+	}
+
+	
+	kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
+	br->ifobj.ktype = NULL;
+	br->ifobj.kset = NULL;
+	br->ifobj.parent = brobj;
+
+	err = kobject_register(&br->ifobj);
+	if (err) {
+		pr_info("%s: can't add kobject (directory) %s/%s\n",
+			__FUNCTION__, dev->name, br->ifobj.name);
+		goto out3;
+	}
+	return 0;
+ out3:
+	sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
+ out2:
+	sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
+ out1:
+	return err;
+
+}
+
+void br_sysfs_delbr(struct net_device *dev)
+{
+	struct kobject *kobj = &dev->class_dev.kobj;
+	struct net_bridge *br = netdev_priv(dev);
+
+	kobject_unregister(&br->ifobj);
+	sysfs_remove_bin_file(kobj, &bridge_forward);
+	sysfs_remove_group(kobj, &bridge_group);
+}