[PATCH net-next v2 4/9] net: introduce MACsec ops and add a reference in net_device

[Antoine Tenart <antoine.tenart@bootlin.com>]

This patch introduces MACsec ops for drivers to support offloading
MACsec operations. A reference to those ops is added in net_device.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
---
 include/linux/netdevice.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 88292953aa6f..59ff123d62e3 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -53,6 +53,7 @@ struct netpoll_info;
 struct device;
 struct phy_device;
 struct dsa_port;
+struct macsec_context;
 
 struct sfp_bus;
 /* 802.11 specific */
@@ -910,6 +911,29 @@ struct xfrmdev_ops {
 };
 #endif
 
+#if defined(CONFIG_MACSEC)
+struct macsec_ops {
+	/* Device wide */
+	int (*mdo_dev_open)(struct macsec_context *ctx);
+	int (*mdo_dev_stop)(struct macsec_context *ctx);
+	/* SecY */
+	int (*mdo_add_secy)(struct macsec_context *ctx);
+	int (*mdo_upd_secy)(struct macsec_context *ctx);
+	int (*mdo_del_secy)(struct macsec_context *ctx);
+	/* Security channels */
+	int (*mdo_add_rxsc)(struct macsec_context *ctx);
+	int (*mdo_upd_rxsc)(struct macsec_context *ctx);
+	int (*mdo_del_rxsc)(struct macsec_context *ctx);
+	/* Security associations */
+	int (*mdo_add_rxsa)(struct macsec_context *ctx);
+	int (*mdo_upd_rxsa)(struct macsec_context *ctx);
+	int (*mdo_del_rxsa)(struct macsec_context *ctx);
+	int (*mdo_add_txsa)(struct macsec_context *ctx);
+	int (*mdo_upd_txsa)(struct macsec_context *ctx);
+	int (*mdo_del_txsa)(struct macsec_context *ctx);
+};
+#endif
+
 struct dev_ifalias {
 	struct rcu_head rcuhead;
 	char ifalias[];
@@ -1755,6 +1779,8 @@ enum netdev_priv_flags {
  *
  *	@wol_enabled:	Wake-on-LAN is enabled
  *
+ *	@macsec_ops:    MACsec offloading ops
+ *
  *	FIXME: cleanup struct net_device such that network protocol info
  *	moves out.
  */
@@ -2036,6 +2062,11 @@ struct net_device {
 	struct lock_class_key	*qdisc_running_key;
 	bool			proto_down;
 	unsigned		wol_enabled:1;
+
+#if IS_ENABLED(CONFIG_MACSEC)
+	/* MACsec management functions */
+	const struct macsec_ops *macsec_ops;
+#endif
 };
 #define to_net_dev(d) container_of(d, struct net_device, dev)
 
-- 
2.21.0