1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index e400d7dfdfc8..8788e3e33852 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -983,6 +983,47 @@ out:
         return ret;
 }
 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
+
+/*
+ * Show and set the number of unsolicted NA's to send after a failover event.
+ */
+static ssize_t bonding_show_n_unsol_na(struct device *d,
+                                       struct device_attribute *attr,
+                                       char *buf)
+{
+        struct bonding *bond = to_bond(d);
+
+        return sprintf(buf, "%d\n", bond->params.num_unsol_na);
+}
+
+static ssize_t bonding_store_n_unsol_na(struct device *d,
+                                        struct device_attribute *attr,
+                                        const char *buf, size_t count)
+{
+        int new_value, ret = count;
+        struct bonding *bond = to_bond(d);
+
+        if (sscanf(buf, "%d", &new_value) != 1) {
+                printk(KERN_ERR DRV_NAME
+                       ": %s: no num_unsol_na value specified.\n",
+                       bond->dev->name);
+                ret = -EINVAL;
+                goto out;
+        }
+        if (new_value < 0 || new_value > 255) {
+                printk(KERN_ERR DRV_NAME
+                       ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
+                       bond->dev->name, new_value);
+                ret = -EINVAL;
+                goto out;
+        } else {
+                bond->params.num_unsol_na = new_value;
+        }
+out:
+        return ret;
+}
+static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
+
 /*
  * Show and set the MII monitor interval.  There are two tricky bits
  * here.  First, if MII monitoring is activated, then we must disable
@@ -1420,6 +1461,7 @@ static struct attribute *per_bond_attrs[] = {
         &dev_attr_lacp_rate.attr,
         &dev_attr_xmit_hash_policy.attr,
         &dev_attr_num_grat_arp.attr,
+        &dev_attr_num_unsol_na.attr,
         &dev_attr_miimon.attr,
         &dev_attr_primary.attr,
         &dev_attr_use_carrier.attr,