1 files changed, 34 insertions, 0 deletions

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 68b893ea8c3a..c236c0e43984 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -149,6 +149,39 @@ static ssize_t store_stp_state(struct device *d,
 static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
                    store_stp_state);
 
+static ssize_t show_group_fwd_mask(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 store_group_fwd_mask(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 (!capable(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(group_fwd_mask, S_IRUGO | S_IWUSR, show_group_fwd_mask,
+                   store_group_fwd_mask);
+
 static ssize_t show_priority(struct device *d, struct device_attribute *attr,
                              char *buf)
 {
@@ -652,6 +685,7 @@ static struct attribute *bridge_attrs[] = {
         &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,