[patch net-next 6/6] mlxsw: spectrum_router: Update multipath hash parameters upon netevents

[Jiri Pirko]

From: Ido Schimmel <ido...@mellanox.com>

Make sure the device and the kernel are performing the multipath hash
according to the same parameters by updating the device whenever the
relevant netevent is generated.

Signed-off-by: Ido Schimmel <ido...@mellanox.com>
Reviewed-by: Petr Machata <pe...@mellanox.com>
Signed-off-by: Jiri Pirko <j...@mellanox.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum_router.c  | 31 +++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index fe99d24..d657f01 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -2078,15 +2078,29 @@ static void mlxsw_sp_router_neigh_event_work(struct 
work_struct *work)
        kfree(net_work);
 }
 
-static int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
+static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp);
+
+static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work)
+{
+       struct mlxsw_sp_netevent_work *net_work =
+               container_of(work, struct mlxsw_sp_netevent_work, work);
+       struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
+
+       mlxsw_sp_mp_hash_init(mlxsw_sp);
+       kfree(net_work);
+}
+
+static int mlxsw_sp_router_netevent_event(struct notifier_block *nb,
                                          unsigned long event, void *ptr)
 {
        struct mlxsw_sp_netevent_work *net_work;
        struct mlxsw_sp_port *mlxsw_sp_port;
+       struct mlxsw_sp_router *router;
        struct mlxsw_sp *mlxsw_sp;
        unsigned long interval;
        struct neigh_parms *p;
        struct neighbour *n;
+       struct net *net;
 
        switch (event) {
        case NETEVENT_DELAY_PROBE_TIME_UPDATE:
@@ -2138,6 +2152,21 @@ static int mlxsw_sp_router_netevent_event(struct 
notifier_block *unused,
                mlxsw_core_schedule_work(&net_work->work);
                mlxsw_sp_port_dev_put(mlxsw_sp_port);
                break;
+       case NETEVENT_MULTIPATH_HASH_UPDATE:
+               net = ptr;
+
+               if (!net_eq(net, &init_net))
+                       return NOTIFY_DONE;
+
+               net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
+               if (!net_work)
+                       return NOTIFY_BAD;
+
+               router = container_of(nb, struct mlxsw_sp_router, netevent_nb);
+               INIT_WORK(&net_work->work, mlxsw_sp_router_mp_hash_event_work);
+               net_work->mlxsw_sp = router->mlxsw_sp;
+               mlxsw_core_schedule_work(&net_work->work);
+               break;
        }
 
        return NOTIFY_DONE;
-- 
2.9.5