Merge branch 'mlx4-next'

Or Gerlitz says:

====================
Add HA and LAG support to mlx4 RoCE and SRIOV services

This series takes advanges of bonding mlx4 Ethernet devices to support
a model of High-Availability and Link Aggregation for more environments.

The mlx4 driver reacts on netdev events generated by bonding when
slave state changes happen by programming a HW V2P (Virt-to-Phys)
port table. Bonding was extended to expose these state changes
through netdev events.

When an mlx4 interface such as the mlx4 IB/RoCE driver is subject to
this policy, QPs are created over virtual ports which are mapped
to one of the two physical ports. When a failure happens, the
re-programming of the V2P table allows traffic to keep flowing.

The mlx4 Ethernet driver interfaces are not subject to this
policy and act as usual.

A 2nd use-case for this model would be to add HA and Link Aggregation
support to single ported mlx4 Ethernet VFs. In this case, the PF Ethernet
intrfaces are bonded, all the VFs see single port devices (which is
supported already today), and VF QPs are subject to V2P.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/net/bonding.h b/include/net/bonding.h
index 29f53eacac0a..4e17095ad46a 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -150,6 +150,12 @@ struct bond_parm_tbl {
         int mode;
 };
 
+struct netdev_notify_work {
+        struct delayed_work     work;
+        struct slave            *slave;
+        struct net_device       *dev;
+};
+
 struct slave {
         struct net_device *dev; /* first - useful for panic debug */
         struct bonding *bond; /* our master */
@@ -243,6 +249,8 @@ struct bonding {
 #define bond_slave_get_rtnl(dev) \
         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 
+void bond_queue_slave_event(struct slave *slave);
+
 struct bond_vlan_tag {
         __be16          vlan_proto;
         unsigned short  vlan_id;
@@ -315,6 +323,7 @@ static inline void bond_set_active_slave(struct slave *slave)
 {
         if (slave->backup) {
                 slave->backup = 0;
+                bond_queue_slave_event(slave);
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
         }
 }
@@ -323,6 +332,7 @@ static inline void bond_set_backup_slave(struct slave *slave)
 {
         if (!slave->backup) {
                 slave->backup = 1;
+                bond_queue_slave_event(slave);
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
         }
 }
@@ -336,6 +346,7 @@ static inline void bond_set_slave_state(struct slave *slave,
         slave->backup = slave_state;
         if (notify) {
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
+                bond_queue_slave_event(slave);
                 slave->should_notify = 0;
         } else {
                 if (slave->should_notify)
@@ -490,6 +501,12 @@ static inline bool bond_is_slave_inactive(struct slave *slave)
         return slave->inactive;
 }
 
+static inline void bond_set_slave_link_state(struct slave *slave, int state)
+{
+        slave->link = state;
+        bond_queue_slave_event(slave);
+}
+
 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 {
         struct in_device *in_dev;