bonding: send learning packets for vlans on slave

[ Upstream commit 21706ee8a47d3ede7fdae0be6d7c0a0e31a83229 ]

There was a regression at some point from the intended functionality of
commit f60c3704e87d ("bonding: Fix alb mode to only use first level
vlans.")

Given the return value vlan_get_encap_level() we need to store the nest
level of the bond device, and then compare the vlan's encap level to
this. Without this, this check always fails and learning packets are
never sent.

In addition, this same commit caused a regression in the behavior of
balance_alb, which requires learning packets be sent for all interfaces
using the slave's mac in order to load balance properly. For vlan's
that have not set a user mac, we can send after checking one bit.
Otherwise we need send the set mac, albeit defeating rx load balancing
for that vlan.

Signed-off-by: Debabrata Banerjee <dbanerje@akamai.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 6dc804e118522946d0d2405f9cdf4af9677d8c72..60666db318867912c086d5ae06ab6a275d780c42 100644 (file)
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -943,6 +943,10 @@ static void alb_send_lp_vid(struct slave *slave, u8 mac_addr[],
        skb->priority = TC_PRIO_CONTROL;
        skb->dev = slave->dev;
 
+       netdev_dbg(slave->bond->dev,
+                  "Send learning packet: dev %s mac %pM vlan %d\n",
+                  slave->dev->name, mac_addr, vid);
+
        if (vid)
                __vlan_hwaccel_put_tag(skb, vlan_proto, vid);
 
@@ -965,14 +969,13 @@ static int alb_upper_dev_walk(struct net_device *upper, void *_data)
        u8 *mac_addr = data->mac_addr;
        struct bond_vlan_tag *tags;
 
-       if (is_vlan_dev(upper) && vlan_get_encap_level(upper) == 0) {
-               if (strict_match &&
-                   ether_addr_equal_64bits(mac_addr,
-                                           upper->dev_addr)) {
+       if (is_vlan_dev(upper) &&
+           bond->nest_level == vlan_get_encap_level(upper) - 1) {
+               if (upper->addr_assign_type == NET_ADDR_STOLEN) {
                        alb_send_lp_vid(slave, mac_addr,
                                        vlan_dev_vlan_proto(upper),
                                        vlan_dev_vlan_id(upper));
-               } else if (!strict_match) {
+               } else {
                        alb_send_lp_vid(slave, upper->dev_addr,
                                        vlan_dev_vlan_proto(upper),
                                        vlan_dev_vlan_id(upper));

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index bf3be2e6d4a801c06fe4d3e6075f5ec4439e4fe5..f0aa57222f178eb544394f51bd6b42cfcce4b28a 100644 (file)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1734,6 +1734,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
        if (bond_mode_uses_xmit_hash(bond))
                bond_update_slave_arr(bond, NULL);
 
+       bond->nest_level = dev_get_nest_level(bond_dev);
+
        netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n",
                    slave_dev->name,
                    bond_is_active_slave(new_slave) ? "an active" : "a backup",

diff --git a/include/net/bonding.h b/include/net/bonding.h
index b2e68657a2162cd55b957c9230779f5d066fe6f3..73799da57400f53d17ac4595e61ce97a38462fc7 100644 (file)
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -198,6 +198,7 @@ struct bonding {
        struct   slave __rcu *primary_slave;
        struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
        bool     force_primary;
+       u32      nest_level;
        s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
        int     (*recv_probe)(const struct sk_buff *, struct bonding *,
                              struct slave *);