1 files changed, 283 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
new file mode 100644
index 00000000..6229b627
--- /dev/null
+++ b/net/bridge/br_sysfs_if.c
@@ -0,0 +1,283 @@
+/*
+ *	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/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+
+#include "br_private.h"
+
+struct brport_attribute {
+	struct attribute	attr;
+	ssize_t (*show)(struct net_bridge_port *, char *);
+	int (*store)(struct net_bridge_port *, unsigned long);
+};
+
+#define BRPORT_ATTR(_name,_mode,_show,_store)		        \
+struct brport_attribute brport_attr_##_name = { 	        \
+	.attr = {.name = __stringify(_name), 			\
+		 .mode = _mode },				\
+	.show	= _show,					\
+	.store	= _store,					\
+};
+
+static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->path_cost);
+}
+
+static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
+		   show_path_cost, br_stp_set_path_cost);
+
+static ssize_t show_priority(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->priority);
+}
+
+static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
+			 show_priority, br_stp_set_port_priority);
+
+static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
+{
+	return br_show_bridge_id(buf, &p->designated_root);
+}
+static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
+
+static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
+{
+	return br_show_bridge_id(buf, &p->designated_bridge);
+}
+static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
+
+static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->designated_port);
+}
+static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
+
+static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->designated_cost);
+}
+static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
+
+static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "0x%x\n", p->port_id);
+}
+static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
+
+static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "0x%x\n", p->port_no);
+}
+
+static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
+
+static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->topology_change_ack);
+}
+static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
+
+static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->config_pending);
+}
+static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
+
+static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->state);
+}
+static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
+
+static ssize_t show_message_age_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
+}
+static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
+
+static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
+}
+static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
+
+static ssize_t show_hold_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
+}
+static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
+
+static int store_flush(struct net_bridge_port *p, unsigned long v)
+{
+	br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
+	return 0;
+}
+static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
+
+static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf)
+{
+	int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0;
+	return sprintf(buf, "%d\n", hairpin_mode);
+}
+static int store_hairpin_mode(struct net_bridge_port *p, unsigned long v)
+{
+	if (v)
+		p->flags |= BR_HAIRPIN_MODE;
+	else
+		p->flags &= ~BR_HAIRPIN_MODE;
+	return 0;
+}
+static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
+		   show_hairpin_mode, store_hairpin_mode);
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->multicast_router);
+}
+
+static int store_multicast_router(struct net_bridge_port *p,
+				      unsigned long v)
+{
+	return br_multicast_set_port_router(p, v);
+}
+static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
+		   store_multicast_router);
+#endif
+
+static struct brport_attribute *brport_attrs[] = {
+	&brport_attr_path_cost,
+	&brport_attr_priority,
+	&brport_attr_port_id,
+	&brport_attr_port_no,
+	&brport_attr_designated_root,
+	&brport_attr_designated_bridge,
+	&brport_attr_designated_port,
+	&brport_attr_designated_cost,
+	&brport_attr_state,
+	&brport_attr_change_ack,
+	&brport_attr_config_pending,
+	&brport_attr_message_age_timer,
+	&brport_attr_forward_delay_timer,
+	&brport_attr_hold_timer,
+	&brport_attr_flush,
+	&brport_attr_hairpin_mode,
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	&brport_attr_multicast_router,
+#endif
+	NULL
+};
+
+#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
+#define to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)
+
+static ssize_t brport_show(struct kobject * kobj,
+			   struct attribute * attr, char * buf)
+{
+	struct brport_attribute * brport_attr = to_brport_attr(attr);
+	struct net_bridge_port * p = to_brport(kobj);
+
+	return brport_attr->show(p, buf);
+}
+
+static ssize_t brport_store(struct kobject * kobj,
+			    struct attribute * attr,
+			    const char * buf, size_t count)
+{
+	struct brport_attribute * brport_attr = to_brport_attr(attr);
+	struct net_bridge_port * p = to_brport(kobj);
+	ssize_t ret = -EINVAL;
+	char *endp;
+	unsigned long val;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp != buf) {
+		if (!rtnl_trylock())
+			return restart_syscall();
+		if (p->dev && p->br && brport_attr->store) {
+			spin_lock_bh(&p->br->lock);
+			ret = brport_attr->store(p, val);
+			spin_unlock_bh(&p->br->lock);
+			if (ret == 0)
+				ret = count;
+		}
+		rtnl_unlock();
+	}
+	return ret;
+}
+
+const struct sysfs_ops brport_sysfs_ops = {
+	.show = brport_show,
+	.store = brport_store,
+};
+
+/*
+ * Add sysfs entries to ethernet device added to a bridge.
+ * Creates a brport subdirectory with bridge attributes.
+ * Puts symlink in bridge's brif subdirectory
+ */
+int br_sysfs_addif(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	struct brport_attribute **a;
+	int err;
+
+	err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
+				SYSFS_BRIDGE_PORT_LINK);
+	if (err)
+		return err;
+
+	for (a = brport_attrs; *a; ++a) {
+		err = sysfs_create_file(&p->kobj, &((*a)->attr));
+		if (err)
+			return err;
+	}
+
+	strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+	return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
+}
+
+/* Rename bridge's brif symlink */
+int br_sysfs_renameif(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	int err;
+
+	/* If a rename fails, the rollback will cause another
+	 * rename call with the existing name.
+	 */
+	if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
+		return 0;
+
+	err = sysfs_rename_link(br->ifobj, &p->kobj,
+				p->sysfs_name, p->dev->name);
+	if (err)
+		netdev_notice(br->dev, "unable to rename link %s to %s",
+			      p->sysfs_name, p->dev->name);
+	else
+		strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+
+	return err;
+}