Merge branch 'mlxsw-ipv4-unicast-routing'

Jiri Pirko says:

====================
mlxsw: Implement IPV4 unicast routing

This patchset enables IPv4 unicast routing in the Mellanox Spectrum ASIC
switch driver. This builds upon the work that was done by a couple of
previous patchsets.

Patches 1,2,6 add a couple of dependencies outside the driver. Namely, the
ability to propagate ndo_neigh_construct()/destroy() through stacked devices and
a notification whenever DELAY_PROBE_TIME changes. When propagated down, the
ndos allow drivers to add and remove neighbour entries from their private
neighbour table. The DELAY_PROBE_TIME notification gives drivers the ability to
correctly configure their polling interval for neighbour activity, so that
active neighbour won't be marked as STALE.

Patches 3-5,7-8 add the neighbour offloading infrastructure, where patch 7 uses
the DELAY_PROBE_TIME notification in order to correctly configure the device's
polling interval. Patch 8 finally programs neighbours to the device's table
based on NEIGH_UPDATE notifications, so that directly connected routes can
be used.

Patches 9-16 build upon the previous patches and extend the router with
remote routes (nexthop) support.
====================

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

1 files changed, 44 insertions, 0 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index a4f3b0a9aeaf..b92d63bfde7a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6087,6 +6087,50 @@ void netdev_lower_state_changed(struct net_device *lower_dev,
 }
 EXPORT_SYMBOL(netdev_lower_state_changed);
 
+int netdev_default_l2upper_neigh_construct(struct net_device *dev,
+                                           struct neighbour *n)
+{
+        struct net_device *lower_dev, *stop_dev;
+        struct list_head *iter;
+        int err;
+
+        netdev_for_each_lower_dev(dev, lower_dev, iter) {
+                if (!lower_dev->netdev_ops->ndo_neigh_construct)
+                        continue;
+                err = lower_dev->netdev_ops->ndo_neigh_construct(lower_dev, n);
+                if (err) {
+                        stop_dev = lower_dev;
+                        goto rollback;
+                }
+        }
+        return 0;
+
+rollback:
+        netdev_for_each_lower_dev(dev, lower_dev, iter) {
+                if (lower_dev == stop_dev)
+                        break;
+                if (!lower_dev->netdev_ops->ndo_neigh_destroy)
+                        continue;
+                lower_dev->netdev_ops->ndo_neigh_destroy(lower_dev, n);
+        }
+        return err;
+}
+EXPORT_SYMBOL_GPL(netdev_default_l2upper_neigh_construct);
+
+void netdev_default_l2upper_neigh_destroy(struct net_device *dev,
+                                          struct neighbour *n)
+{
+        struct net_device *lower_dev;
+        struct list_head *iter;
+
+        netdev_for_each_lower_dev(dev, lower_dev, iter) {
+                if (!lower_dev->netdev_ops->ndo_neigh_destroy)
+                        continue;
+                lower_dev->netdev_ops->ndo_neigh_destroy(lower_dev, n);
+        }
+}
+EXPORT_SYMBOL_GPL(netdev_default_l2upper_neigh_destroy);
+
 static void dev_change_rx_flags(struct net_device *dev, int flags)
 {
         const struct net_device_ops *ops = dev->netdev_ops;