netdev - [PATCH net-next 11/18] vxlan: Add netif_is

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Message-ID: <20181013171725.3261-12-idosch@mellanox.com>
Date:   Sat, 13 Oct 2018 17:18:38 +0000
From:   Ido Schimmel <idosch@...lanox.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>,
        Petr Machata <petrm@...lanox.com>,
        "ivecera@...hat.com" <ivecera@...hat.com>,
        "roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
        "nikolay@...ulusnetworks.com" <nikolay@...ulusnetworks.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "vivien.didelot@...oirfairelinux.com" 
        <vivien.didelot@...oirfairelinux.com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "stephen@...workplumber.org" <stephen@...workplumber.org>,
        "bridge@...ts.linux-foundation.org" 
        <bridge@...ts.linux-foundation.org>, mlxsw <mlxsw@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 11/18] vxlan: Add netif_is_vxlan()

Add the ability to determine whether a netdev is a VxLAN netdev by
calling the above mentioned function that checks the netdev's private
flags.

This will allow modules to identify netdev events involving a VxLAN
netdev and act accordingly. For example, drivers capable of VxLAN
offload will need to configure the underlying device when a VxLAN netdev
is being enslaved to an offloaded bridge.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Petr Machata <petrm@...lanox.com>
---
 drivers/net/vxlan.c       | 1 +
 include/linux/netdevice.h | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index a646aa8e98ff..9bfd562aa81c 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -3178,6 +3178,7 @@ static int __vxlan_dev_create(struct net *net, struct net_device *dev,
 	if (err)
 		return err;
 
+	dev->priv_flags |= IFF_VXLAN;
 	dev->ethtool_ops = &vxlan_ethtool_ops;
 
 	/* create an fdb entry for a valid default destination */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 22e4ef7bb701..290083ff285a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1487,6 +1487,7 @@ struct net_device_ops {
  * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
  * @IFF_FAILOVER: device is a failover master device
  * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
+ * @IFF_VXLAN: device is a VxLAN device
  */
 enum netdev_priv_flags {
 	IFF_802_1Q_VLAN			= 1<<0,
@@ -1518,6 +1519,7 @@ enum netdev_priv_flags {
 	IFF_NO_RX_HANDLER		= 1<<26,
 	IFF_FAILOVER			= 1<<27,
 	IFF_FAILOVER_SLAVE		= 1<<28,
+	IFF_VXLAN			= 1<<29,
 };
 
 #define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
@@ -1548,6 +1550,7 @@ enum netdev_priv_flags {
 #define IFF_NO_RX_HANDLER		IFF_NO_RX_HANDLER
 #define IFF_FAILOVER			IFF_FAILOVER
 #define IFF_FAILOVER_SLAVE		IFF_FAILOVER_SLAVE
+#define IFF_VXLAN			IFF_VXLAN
 
 /**
  *	struct net_device - The DEVICE structure.
@@ -4567,6 +4570,11 @@ static inline bool netif_is_failover_slave(const struct net_device *dev)
 	return dev->priv_flags & IFF_FAILOVER_SLAVE;
 }
 
+static inline bool netif_is_vxlan(const struct net_device *dev)
+{
+	return dev->priv_flags & IFF_VXLAN;
+}
+
 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
 static inline void netif_keep_dst(struct net_device *dev)
 {
-- 
2.17.2