[PATCH v3 net-next 1/2] net: dsa: add optional stats64 support

[Oleksij Rempel]

Allow DSA drivers to export stats64

Signed-off-by: Oleksij Rempel <o.rem...@pengutronix.de>
Reviewed-by: Vladimir Oltean <olte...@gmail.com>
---
 include/net/dsa.h |  3 +++
 net/dsa/slave.c   | 14 +++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 4e60d2610f20..457b89143875 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -655,6 +655,9 @@ struct dsa_switch_ops {
        int     (*port_change_mtu)(struct dsa_switch *ds, int port,
                                   int new_mtu);
        int     (*port_max_mtu)(struct dsa_switch *ds, int port);
+
+       void    (*get_stats64)(struct dsa_switch *ds, int port,
+                                  struct rtnl_link_stats64 *s);
 };
 
 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)           \
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index ff2266d2b998..6e1a4dc18a97 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1602,6 +1602,18 @@ static struct devlink_port 
*dsa_slave_get_devlink_port(struct net_device *dev)
        return dp->ds->devlink ? &dp->devlink_port : NULL;
 }
 
+static void dsa_slave_get_stats64(struct net_device *dev,
+                                 struct rtnl_link_stats64 *s)
+{
+       struct dsa_port *dp = dsa_slave_to_port(dev);
+       struct dsa_switch *ds = dp->ds;
+
+       if (!ds->ops->get_stats64)
+               return dev_get_tstats64(dev, s);
+
+       return ds->ops->get_stats64(ds, dp->index, s);
+}
+
 static const struct net_device_ops dsa_slave_netdev_ops = {
        .ndo_open               = dsa_slave_open,
        .ndo_stop               = dsa_slave_close,
@@ -1621,7 +1633,7 @@ static const struct net_device_ops dsa_slave_netdev_ops = 
{
 #endif
        .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
        .ndo_setup_tc           = dsa_slave_setup_tc,
-       .ndo_get_stats64        = dev_get_tstats64,
+       .ndo_get_stats64        = dsa_slave_get_stats64,
        .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
        .ndo_vlan_rx_add_vid    = dsa_slave_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = dsa_slave_vlan_rx_kill_vid,
-- 
2.29.2