3 files changed, 68 insertions, 1 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index ef6024468d3c..f22f6bf43858 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -106,6 +106,7 @@ static int arp_interval = BOND_LINK_ARP_INTERV;
 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
 static char *arp_validate;
 static char *fail_over_mac;
+static int all_slaves_active = 0;
 static struct bond_params bonding_defaults;
 
 module_param(max_bonds, int, 0);
@@ -155,6 +156,10 @@ module_param(arp_validate, charp, 0);
 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
 module_param(fail_over_mac, charp, 0);
 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC.  none (default), active or follow");
+module_param(all_slaves_active, int, 0);
+MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
+                                     "by setting active flag for all slaves.  "
+                                     "0 for never (default), 1 for always.");
 
 /*----------------------------- Global variables ----------------------------*/
 
@@ -4771,6 +4776,13 @@ static int bond_check_params(struct bond_params *params)
                 }
         }
 
+        if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
+                pr_warning("Warning: all_slaves_active module parameter (%d), "
+                           "not of valid value (0/1), so it was set to "
+                           "0\n", all_slaves_active);
+                all_slaves_active = 0;
+        }
+
         /* reset values for TLB/ALB */
         if ((bond_mode == BOND_MODE_TLB) ||
             (bond_mode == BOND_MODE_ALB)) {
@@ -4941,6 +4953,7 @@ static int bond_check_params(struct bond_params *params)
         params->primary[0] = 0;
         params->primary_reselect = primary_reselect_value;
         params->fail_over_mac = fail_over_mac_value;
+        params->all_slaves_active = all_slaves_active;
 
         if (primary) {
                 strncpy(params->primary, primary, IFNAMSIZ);
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 496ac1ec614d..066311a5e084 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1411,7 +1411,58 @@ static ssize_t bonding_show_ad_partner_mac(struct device *d,
 }
 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
 
+/*
+ * Show and set the all_slaves_active flag.
+ */
+static ssize_t bonding_show_slaves_active(struct device *d,
+                                          struct device_attribute *attr,
+                                          char *buf)
+{
+        struct bonding *bond = to_bond(d);
+
+        return sprintf(buf, "%d\n", bond->params.all_slaves_active);
+}
+
+static ssize_t bonding_store_slaves_active(struct device *d,
+                                           struct device_attribute *attr,
+                                           const char *buf, size_t count)
+{
+        int i, new_value, ret = count;
+        struct bonding *bond = to_bond(d);
+        struct slave *slave;
+
+        if (sscanf(buf, "%d", &new_value) != 1) {
+                pr_err("%s: no all_slaves_active value specified.\n",
+                       bond->dev->name);
+                ret = -EINVAL;
+                goto out;
+        }
+
+        if (new_value == bond->params.all_slaves_active)
+                goto out;
+
+        if ((new_value == 0) || (new_value == 1)) {
+                bond->params.all_slaves_active = new_value;
+        } else {
+                pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
+                        bond->dev->name, new_value);
+                ret = -EINVAL;
+                goto out;
+        }
 
+        bond_for_each_slave(bond, slave, i) {
+                if (slave->state == BOND_STATE_BACKUP) {
+                        if (new_value)
+                                slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
+                        else
+                                slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
+                }
+        }
+out:
+        return count;
+}
+static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
+                   bonding_show_slaves_active, bonding_store_slaves_active);
 
 static struct attribute *per_bond_attrs[] = {
         &dev_attr_slaves.attr,
@@ -1438,6 +1489,7 @@ static struct attribute *per_bond_attrs[] = {
         &dev_attr_ad_actor_key.attr,
         &dev_attr_ad_partner_key.attr,
         &dev_attr_ad_partner_mac.attr,
+        &dev_attr_all_slaves_active.attr,
         NULL,
 };
 
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index da809645c483..cecdea2a629f 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -131,6 +131,7 @@ struct bond_params {
         char primary[IFNAMSIZ];
         int primary_reselect;
         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
+        int all_slaves_active;
 };
 
 struct bond_parm_tbl {
@@ -290,7 +291,8 @@ static inline void bond_set_slave_inactive_flags(struct slave *slave)
         struct bonding *bond = netdev_priv(slave->dev->master);
         if (!bond_is_lb(bond))
                 slave->state = BOND_STATE_BACKUP;
-        slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
+        if (!bond->params.all_slaves_active)
+                slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
         if (slave_do_arp_validate(bond, slave))
                 slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
 }