Initial import

1 files changed, 889 insertions, 0 deletions

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
new file mode 100644
index 000000000..4c97fc50f
--- /dev/null
+++ b/net/bridge/br_sysfs_br.c
@@ -0,0 +1,889 @@
+/*
+ *	Sysfs attributes of bridge
+ *	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/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+
+#include "br_private.h"
+
+#define to_dev(obj)	container_of(obj, struct device, kobj)
+#define to_bridge(cd)	((struct net_bridge *)netdev_priv(to_net_dev(cd)))
+
+/*
+ * Common code for storing bridge parameters.
+ */
+static ssize_t store_bridge_parm(struct device *d,
+				 const char *buf, size_t len,
+				 int (*set)(struct net_bridge *, unsigned long))
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+	int err;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	err = (*set)(br, val);
+	return err ? err : len;
+}
+
+
+static ssize_t forward_delay_show(struct device *d,
+				  struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
+}
+
+static ssize_t forward_delay_store(struct device *d,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_forward_delay);
+}
+static DEVICE_ATTR_RW(forward_delay);
+
+static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
+			       char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(d)->hello_time));
+}
+
+static ssize_t hello_time_store(struct device *d,
+				struct device_attribute *attr, const char *buf,
+				size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_hello_time);
+}
+static DEVICE_ATTR_RW(hello_time);
+
+static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
+			    char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(d)->max_age));
+}
+
+static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
+			     const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_max_age);
+}
+static DEVICE_ATTR_RW(max_age);
+
+static ssize_t ageing_time_show(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
+}
+
+static int set_ageing_time(struct net_bridge *br, unsigned long val)
+{
+	br->ageing_time = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t ageing_time_store(struct device *d,
+				 struct device_attribute *attr,
+				 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_ageing_time);
+}
+static DEVICE_ATTR_RW(ageing_time);
+
+static ssize_t stp_state_show(struct device *d,
+			      struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->stp_enabled);
+}
+
+
+static ssize_t stp_state_store(struct device *d,
+			       struct device_attribute *attr, const char *buf,
+			       size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+	br_stp_set_enabled(br, val);
+	rtnl_unlock();
+
+	return len;
+}
+static DEVICE_ATTR_RW(stp_state);
+
+static ssize_t group_fwd_mask_show(struct device *d,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%#x\n", br->group_fwd_mask);
+}
+
+
+static ssize_t group_fwd_mask_store(struct device *d,
+				    struct device_attribute *attr,
+				    const char *buf,
+				    size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	if (val & BR_GROUPFWD_RESTRICTED)
+		return -EINVAL;
+
+	br->group_fwd_mask = val;
+
+	return len;
+}
+static DEVICE_ATTR_RW(group_fwd_mask);
+
+static ssize_t priority_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n",
+		       (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
+}
+
+static int set_priority(struct net_bridge *br, unsigned long val)
+{
+	br_stp_set_bridge_priority(br, (u16) val);
+	return 0;
+}
+
+static ssize_t priority_store(struct device *d, struct device_attribute *attr,
+			      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_priority);
+}
+static DEVICE_ATTR_RW(priority);
+
+static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
+			    char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
+}
+static DEVICE_ATTR_RO(root_id);
+
+static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
+}
+static DEVICE_ATTR_RO(bridge_id);
+
+static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->root_port);
+}
+static DEVICE_ATTR_RO(root_port);
+
+static ssize_t root_path_cost_show(struct device *d,
+				   struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
+}
+static DEVICE_ATTR_RO(root_path_cost);
+
+static ssize_t topology_change_show(struct device *d,
+				    struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
+}
+static DEVICE_ATTR_RO(topology_change);
+
+static ssize_t topology_change_detected_show(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->topology_change_detected);
+}
+static DEVICE_ATTR_RO(topology_change_detected);
+
+static ssize_t hello_timer_show(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
+}
+static DEVICE_ATTR_RO(hello_timer);
+
+static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
+}
+static DEVICE_ATTR_RO(tcn_timer);
+
+static ssize_t topology_change_timer_show(struct device *d,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
+}
+static DEVICE_ATTR_RO(topology_change_timer);
+
+static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
+}
+static DEVICE_ATTR_RO(gc_timer);
+
+static ssize_t group_addr_show(struct device *d,
+			       struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
+		       br->group_addr[0], br->group_addr[1],
+		       br->group_addr[2], br->group_addr[3],
+		       br->group_addr[4], br->group_addr[5]);
+}
+
+static ssize_t group_addr_store(struct device *d,
+				struct device_attribute *attr,
+				const char *buf, size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	u8 new_addr[6];
+	int i;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+		   &new_addr[0], &new_addr[1], &new_addr[2],
+		   &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
+		return -EINVAL;
+
+	if (!is_link_local_ether_addr(new_addr))
+		return -EINVAL;
+
+	if (new_addr[5] == 1 ||		/* 802.3x Pause address */
+	    new_addr[5] == 2 ||		/* 802.3ad Slow protocols */
+	    new_addr[5] == 3)		/* 802.1X PAE address */
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	spin_lock_bh(&br->lock);
+	for (i = 0; i < 6; i++)
+		br->group_addr[i] = new_addr[i];
+	spin_unlock_bh(&br->lock);
+
+	br->group_addr_set = true;
+	br_recalculate_fwd_mask(br);
+
+	rtnl_unlock();
+
+	return len;
+}
+
+static DEVICE_ATTR_RW(group_addr);
+
+static ssize_t flush_store(struct device *d,
+			   struct device_attribute *attr,
+			   const char *buf, size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	br_fdb_flush(br);
+	return len;
+}
+static DEVICE_ATTR_WO(flush);
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+static ssize_t multicast_router_show(struct device *d,
+				     struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_router);
+}
+
+static ssize_t multicast_router_store(struct device *d,
+				      struct device_attribute *attr,
+				      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_router);
+}
+static DEVICE_ATTR_RW(multicast_router);
+
+static ssize_t multicast_snooping_show(struct device *d,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", !br->multicast_disabled);
+}
+
+static ssize_t multicast_snooping_store(struct device *d,
+					struct device_attribute *attr,
+					const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_toggle);
+}
+static DEVICE_ATTR_RW(multicast_snooping);
+
+static ssize_t multicast_query_use_ifaddr_show(struct device *d,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
+}
+
+static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_use_ifaddr = !!val;
+	return 0;
+}
+
+static ssize_t
+multicast_query_use_ifaddr_store(struct device *d,
+				 struct device_attribute *attr,
+				 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
+}
+static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
+
+static ssize_t multicast_querier_show(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_querier);
+}
+
+static ssize_t multicast_querier_store(struct device *d,
+				       struct device_attribute *attr,
+				       const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_querier);
+}
+static DEVICE_ATTR_RW(multicast_querier);
+
+static ssize_t hash_elasticity_show(struct device *d,
+				    struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->hash_elasticity);
+}
+
+static int set_elasticity(struct net_bridge *br, unsigned long val)
+{
+	br->hash_elasticity = val;
+	return 0;
+}
+
+static ssize_t hash_elasticity_store(struct device *d,
+				     struct device_attribute *attr,
+				     const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_elasticity);
+}
+static DEVICE_ATTR_RW(hash_elasticity);
+
+static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->hash_max);
+}
+
+static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
+			      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
+}
+static DEVICE_ATTR_RW(hash_max);
+
+static ssize_t multicast_last_member_count_show(struct device *d,
+						struct device_attribute *attr,
+						char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->multicast_last_member_count);
+}
+
+static int set_last_member_count(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_last_member_count = val;
+	return 0;
+}
+
+static ssize_t multicast_last_member_count_store(struct device *d,
+						 struct device_attribute *attr,
+						 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_last_member_count);
+}
+static DEVICE_ATTR_RW(multicast_last_member_count);
+
+static ssize_t multicast_startup_query_count_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->multicast_startup_query_count);
+}
+
+static int set_startup_query_count(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_startup_query_count = val;
+	return 0;
+}
+
+static ssize_t multicast_startup_query_count_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_startup_query_count);
+}
+static DEVICE_ATTR_RW(multicast_startup_query_count);
+
+static ssize_t multicast_last_member_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_last_member_interval));
+}
+
+static int set_last_member_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_last_member_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_last_member_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_last_member_interval);
+}
+static DEVICE_ATTR_RW(multicast_last_member_interval);
+
+static ssize_t multicast_membership_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_membership_interval));
+}
+
+static int set_membership_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_membership_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_membership_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_membership_interval);
+}
+static DEVICE_ATTR_RW(multicast_membership_interval);
+
+static ssize_t multicast_querier_interval_show(struct device *d,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_querier_interval));
+}
+
+static int set_querier_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_querier_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_querier_interval_store(struct device *d,
+						struct device_attribute *attr,
+						const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_querier_interval);
+}
+static DEVICE_ATTR_RW(multicast_querier_interval);
+
+static ssize_t multicast_query_interval_show(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_query_interval));
+}
+
+static int set_query_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_query_interval_store(struct device *d,
+					      struct device_attribute *attr,
+					      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_interval);
+}
+static DEVICE_ATTR_RW(multicast_query_interval);
+
+static ssize_t multicast_query_response_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(
+		buf, "%lu\n",
+		jiffies_to_clock_t(br->multicast_query_response_interval));
+}
+
+static int set_query_response_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_response_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_query_response_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_response_interval);
+}
+static DEVICE_ATTR_RW(multicast_query_response_interval);
+
+static ssize_t multicast_startup_query_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(
+		buf, "%lu\n",
+		jiffies_to_clock_t(br->multicast_startup_query_interval));
+}
+
+static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_startup_query_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_startup_query_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_startup_query_interval);
+}
+static DEVICE_ATTR_RW(multicast_startup_query_interval);
+#endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+static ssize_t nf_call_iptables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_iptables);
+}
+
+static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_iptables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_iptables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_iptables);
+}
+static DEVICE_ATTR_RW(nf_call_iptables);
+
+static ssize_t nf_call_ip6tables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_ip6tables);
+}
+
+static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_ip6tables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_ip6tables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
+}
+static DEVICE_ATTR_RW(nf_call_ip6tables);
+
+static ssize_t nf_call_arptables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_arptables);
+}
+
+static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_arptables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_arptables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_arptables);
+}
+static DEVICE_ATTR_RW(nf_call_arptables);
+#endif
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+static ssize_t vlan_filtering_show(struct device *d,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->vlan_enabled);
+}
+
+static ssize_t vlan_filtering_store(struct device *d,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
+}
+static DEVICE_ATTR_RW(vlan_filtering);
+
+static ssize_t vlan_protocol_show(struct device *d,
+				  struct device_attribute *attr,
+				  char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
+}
+
+static ssize_t vlan_protocol_store(struct device *d,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_set_proto);
+}
+static DEVICE_ATTR_RW(vlan_protocol);
+
+static ssize_t default_pvid_show(struct device *d,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->default_pvid);
+}
+
+static ssize_t default_pvid_store(struct device *d,
+				  struct device_attribute *attr,
+				  const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
+}
+static DEVICE_ATTR_RW(default_pvid);
+#endif
+
+static struct attribute *bridge_attrs[] = {
+	&dev_attr_forward_delay.attr,
+	&dev_attr_hello_time.attr,
+	&dev_attr_max_age.attr,
+	&dev_attr_ageing_time.attr,
+	&dev_attr_stp_state.attr,
+	&dev_attr_group_fwd_mask.attr,
+	&dev_attr_priority.attr,
+	&dev_attr_bridge_id.attr,
+	&dev_attr_root_id.attr,
+	&dev_attr_root_path_cost.attr,
+	&dev_attr_root_port.attr,
+	&dev_attr_topology_change.attr,
+	&dev_attr_topology_change_detected.attr,
+	&dev_attr_hello_timer.attr,
+	&dev_attr_tcn_timer.attr,
+	&dev_attr_topology_change_timer.attr,
+	&dev_attr_gc_timer.attr,
+	&dev_attr_group_addr.attr,
+	&dev_attr_flush.attr,
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	&dev_attr_multicast_router.attr,
+	&dev_attr_multicast_snooping.attr,
+	&dev_attr_multicast_querier.attr,
+	&dev_attr_multicast_query_use_ifaddr.attr,
+	&dev_attr_hash_elasticity.attr,
+	&dev_attr_hash_max.attr,
+	&dev_attr_multicast_last_member_count.attr,
+	&dev_attr_multicast_startup_query_count.attr,
+	&dev_attr_multicast_last_member_interval.attr,
+	&dev_attr_multicast_membership_interval.attr,
+	&dev_attr_multicast_querier_interval.attr,
+	&dev_attr_multicast_query_interval.attr,
+	&dev_attr_multicast_query_response_interval.attr,
+	&dev_attr_multicast_startup_query_interval.attr,
+#endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+	&dev_attr_nf_call_iptables.attr,
+	&dev_attr_nf_call_ip6tables.attr,
+	&dev_attr_nf_call_arptables.attr,
+#endif
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+	&dev_attr_vlan_filtering.attr,
+	&dev_attr_vlan_protocol.attr,
+	&dev_attr_default_pvid.attr,
+#endif
+	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 file *filp, struct kobject *kobj,
+			      struct bin_attribute *bin_attr,
+			      char *buf, loff_t off, size_t count)
+{
+	struct device *dev = to_dev(kobj);
+	struct net_bridge *br = to_bridge(dev);
+	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, },
+	.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->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",
+			__func__, dev->name, bridge_group.name);
+		goto out1;
+	}
+
+	err = sysfs_create_bin_file(brobj, &bridge_forward);
+	if (err) {
+		pr_info("%s: can't create attribute file %s/%s\n",
+			__func__, dev->name, bridge_forward.attr.name);
+		goto out2;
+	}
+
+	br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
+	if (!br->ifobj) {
+		pr_info("%s: can't add kobject (directory) %s/%s\n",
+			__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
+		goto out3;
+	}
+	return 0;
+ out3:
+	sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
+ out2:
+	sysfs_remove_group(&dev->dev.kobj, &bridge_group);
+ out1:
+	return err;
+
+}
+
+void br_sysfs_delbr(struct net_device *dev)
+{
+	struct kobject *kobj = &dev->dev.kobj;
+	struct net_bridge *br = netdev_priv(dev);
+
+	kobject_put(br->ifobj);
+	sysfs_remove_bin_file(kobj, &bridge_forward);
+	sysfs_remove_group(kobj, &bridge_group);
+}